Original subtitles

AQUA2MAN.

It was given the code name UML-01.

We need the central computer.

I think we need to insert the memory cards here.

Yeah, it's booting up.

"Please state the reboot code."

Bold? Behold?

Behold, N, A, T, U, R, E.

-Okay! -Rebooting the Midas's central computer.

Should we go upstairs?

Check his phone.

This is Sim Hye-sung.

It looks like a human.

He's a total monster now.

AGENTS OF MYSTERY

Hold on.

It was the size of an adult human being,

but its face looked similar to the creature we saw,

which brought up some speculations.

It seemed likely that the creature became one with Ahn Joo-hyoung

after entering his respiratory tract.

I think you're right. It entered Ahn Joo-hyoung's body

-and turned him into what he is now. -Exactly.

And this man was hiding here.

It seems like everyone died hiding in their areas.

But what was he saying about Jang Man-gyeong?

All of this happened because of Jang Man-gyeong's greed.

-He said something about greed. -Jang Man-gyeong's greed.

-Right, Jang Man-gyeong's greed. -Yeah.

He was the boss.

CHAIRMAN OF THE COUNCIL JANG MAN-GYEONG

Seeing those pictures makes me sad.

-Me too. -Oh no.

-What are they? -They've been here for a long time,

-doing research together. -Yeah.

Could you open that, Do-hoon?

You're in charge of those.

-This is so scary. -Exactly.

I found a flashlight.

Nice, we might need that.

-This could be the UV light. -Is it?

-Is this the UV light? -Yes.

Are you sure?

I think it's just a flashlight.

UV lights are the ones that reveal things

-on white surfaces. -That's right.

-Hidden letters and stuff? -Yes.

That's how they check entrance stamps in nightclubs.

But this is just a regular light.

-Do you have it memorized now? -Somewhat.

Was there anything on his ID card?

Same thing. Level R, Morse code.

-Morse code on the back? -Yes.

It's exactly the same.

Guys.

I'm so scared that something will pop out.

If that happens, I'm running away.

I think this goes here.

Done.

Nice.

I'll open the door.

Danger is right around the corner now.

-I know. -It could pop out of that door.

So let's just leave Karina here and run.

Why her again?

Well, that's her role.

She's the bravest out of us.

Let's do it. What's the worst that could happen?

-I'm pressing the button. -Do it.

It's the bunks.

I hate this.

We opened the door to the bunks.

And thankfully, the monster wasn't there.

There were five rooms.

We decided to split up and look for clues.

Okay.

JI YOUNG-KOO

SIM HYE-SUNG

The doors aren't locked.

JO JONG-SUN

SIM HYE-SUNG

Let's search each room.

-Should we start searching? -Find whatever we can.

We found a recorder here.

JI YOUNG-KOO

JO JONG-SUN

AHN JOO-HYOUNG

AHN JOO-HYOUNG, RESEARCHER

SIM HYE-SUNG

A selfie stick?

JI YOUNG-KOO

JO JONG-SUN

Another flashlight.

-Did you find anything, Karina? -Just this flashlight.

There's nothing here.

-Have you checked the shelves? -Yeah, nothing.

-Any clues? -No.

-Did you find anything? -No.

Should we hear what's on the recorder?

-Okay. -Where is it?

Right here.

Does it turn on?

-I haven't tried yet. -Do you have a helmet on?

Just in case.

It looks good on you.

-That'll protect your head. -Everyone had a flashlight.

Something feels off about Jang Man-gyeong, the chairman of the Research Council.

Since the discovery of UML-01,

he has made some questionable decisions.

Additionally, early every morning,

he sneaks down to the first floor when no one is around.

The first floor?

I suspect he's spending time in the laboratory.

Laboratory?

I'll be recording my conversations with Jang from now on.

Sir.

Joo-hyoung isn't looking good. We should return as soon as possible.

The submarine is repaired.

We can return to base if we want.

We must run additional tests to make sure it's safe to travel.

Additional tests, sir?

It's in good enough shape to get us back home.

And what if something happens on our way back?

You're not to speak of returning until the tests are complete.

Sir.

You've been acting weird lately.

Are you hiding something from us?

Nonsense!

I have nothing to hide!

Then why did you go down to the first floor yesterday morning?

I was checking on Joo-hyoung.

If we don't getresults on this expedition,

the investors are going to pull out.

We'll only discuss our return once the tests are complete.

You're dismissed.

Has anyone seen my cigarettes?

Cigarettes?

"No smoking inside the submarine."

You don't even smoke, sir.

Why do you need cigarettes?

Or are you just trying to look at the contract?

The contract?

What did you just say?

Did you think I wouldn't know?

-I saw what was in the safe. -The safe?

Your contract with Star & Stone Industry.

What on earth is the Living Weapon Project?

Living Weapon?

They're a weapons manufacturer.

Did you go through my stuff?

I'm here...

to research deep sea creatures,

not to develop living weapons.

Sir.

Have you thrown away your integrity as a researcher?

It's not what it looks like, Sim.

Sir.

We need to return to base now.

It's not that simple.

I told the investors that we'd be returning,

but I got shot down.

What are you talking about?

The submarine is functioning again.

The Midas's central computer is connected

with the Star & Stone Industry.

We can't move an inch without authorization.

So let's cut the connection

and operate it manually under emergency protocol.

-Operate it how? -Manually.

I'll go to the cockpit

and get us back home, sir.

No.

That thing is on the first floor.

It could kill us either way. What difference does it make?

I'll shut down the central computer.

-Central computer. -I'll report back

once we're in manual mode.

Something feels off about Jang Man-gyeong, the chairman of the Research Council.

-Is it on repeat? -Yes, it is.

So this is what happened.

There was a conflict between the deep sea creatures research team

and Chairman Jang Man-gyeong,

-who wanted to develop living weapons. -Exactly.

-They found out about his plan. -Right.

But here's a question.

A non-smoker looking for cigarettes?

Did he hide something in the pack?

That's a possibility.

-Jang Man-gyeong doesn't smoke. -Inside the pack.

So why was he suddenly looking for cigarettes?

-Exactly. -Something might be in there.

-Maybe a lamp or a key of some sort. -Right.

-That's possible. -He could've hidden something like this.

-It could be the key to that cabinet. -Right.

And Jang Man-gyeong was trying to develop living weapons.

He was paid by a weapons manufacturer.

We found out two things.

First, researching deep sea creatures wasn't the only purpose of this submarine.

Second, Jang Man-gyeong was looking for cigarettes

even though he doesn't smoke.

And during that conversation, they mentioned a safe.

We need to find the cigarettes that he was looking for.

-And the contract is in the safe. -Correct.

-Where's Jang Man-gyeong's room? -It's not one of these, is it?

-No. -I don't think so.

-Is it on the blueprint? -No.

Does he have a separate room?

I see the bunks, kitchen, and docking room.

-We're here where the bunks are. -Right.

-The next room is the chairman's room. -Right.

-Yeah. -We need to go in there.

-The safe's there. -I thought that was another restroom.

-Me too. -Same.

I think I know where the UV light is.

-Where? -From what we saw earlier,

Ahn was replacing the UV light when the creature jumped inside him.

-You mean that stick? -Yeah, there was a light inside the case.

-Where they put their hands in. -I saw it too.

Should we bring it to see if it still works?

That's a good idea.

-Let's go once we open the door. -No, I'll just go get it now.

-Okay, let's do that. -I'll go with you.

Let's go together.

-You two go ahead. -All right.

-Try not to get locked up this time. -Of course.

We'll find a way out.

That's hilarious.

-We're brothers in chained arms. -Absolutely.

-We'll be waiting. -Do you need the bag?

No, just hold on to it.

You know we'll be back, right?

It's like deja vu.

I know.

-It's the pantry all over again. -You're right.

Right here.

-This is the UV light, right? -Yeah.

It's not connected to a power source, so it won't turn on anyway.

But let's take it with us and see if we can hook it up to something.

We may be wrong, but this seems to be the UV light he was trying to replace.

-We'll have to plug it in somewhere. -I guess so.

There was a socket downstairs, but there wasn't any power.

-Is this the only one? -Yeah.

But are we sure this is it?

-Let's hold on to it for now. -All right.

Let's go.

-We need to open that door. -I know.

But how do we do it?

-I don't know about this. -What?

-I really don't. -You got a bad feeling?

-I have a bad feeling about this. -I totally get it.

What does this door lead to?

-The chairman's room. -Right.

I'm terrified.

-This is so scary. -Tell me about it.

I can barely speak right now.

Would it be better for us to wait over there?

I think this would be better.

If we die, we'll die together.

-Why don't we all go in at once? -Good idea.

-Then we might have a chance. -Let's do it.

No, we need to play it safe.

-We need to survive. -He's right.

So what we should do is...

Open and run?

-One of us should open it. -Sure.

-And the rest should wait over there. -Sounds good.

-I'll open it and run then. -Okay.

-Are you sure? -Yes.

Let's stand over there.

-Do-hoon. -I'll hold the bag.

No, just hold this for me.

I got the bag.

-Is it you two again? -Yeah.

Hurry, go.

Go on.

-We're... -Do-hoon.

-Careful, Yong-jin. -We always end up together.

I know.

-It's good to have you. -I know. We got this.

We'll be safest here.

-Let's stay here. -This is so selfish of us.

If something shows up,

we'll wait for those two and close the door behind them.

-I'm opening it. -Okay.

-Go on. -Here I go.

It's just a door. Come on.

-We're such cowards. -This is embarrassing.

This is the restroom.

That's the shower.

There's no corpse here.

-Is there a corpse? -No.

Just blood.

I don't like this at all.

What's that?

There was blood on the floor,

and right above it was a vent with some strings hanging from it.

When I looked closely, I realized they were shoelaces.

Are those shoelaces?

-I think so. -Can we not open that vent?

-There's blood. -Someone might be inside.

-Are you going to open it, Yong-jin? -What?

-It obviously needs to be opened. -Wait.

-I think it's just the shoes. -Where's the flashlight?

Do you think he died up there?

We have to get it open.

There's nothing else to be done.

When we were on the first floor,

-the monster was in the vents, right? -Yeah.

Then the monster could really be in the vents.

But why is it closed?

Is this a good idea?

-The fact that it's closed... -Try pulling the shoelace.

Yong-jin.

See if something moves.

Maybe there's a reason it's closed.

Yong-jin.

Hold on.

I'm worried something might fall on you.

I'll open it from this side.

-Good idea. -I'm scared.

Come on up.

Please be careful.

Try pulling it.

Watch your head.

-Darn it. -It's a body.

That was so scary.

This is too much.

When I pulled on the shoelace, something suddenly fell,

and it was someone's leg.

I was shocked at first,

but I realized that it was another body.

My neck.

-Did you see my reflexes just now? -Yeah.

Darn it.

Whose body is it?

-Probably Jang Man-gyeong. -You think so?

But he's the chairman.

He wouldn't wear work boots.

But we're on a submarine.

-He could be in work clothes. -It has to be him.

He's the only one left

-besides Ahn Joo-hyoung, who's a monster. -Or Ahn Joo-hyoung.

We've found four bodies, right?

-Three on the first floor, one here. -He's our fifth.

-I think... -We should pull the body down.

-Let's do it. -He was hiding here.

It must be heavy.

That's just...

Do we have to?

-I'll hold the flashlight. -We have to check his stuff.

-Give me the flashlight. -Careful.

Got him.

My goodness!

-We did it. -Hold him.

His face is gone.

Who is he?

Who is he? Check his pockets.

We couldn't find his ID card.

There was nothing on him.

We can't be sure if he's Jang Man-gyeong or not.

This is the first body without an ID card on it.

Let's take another look.

-What? Another look? -Let's take a look inside.

There's nothing on him.

Light, please.

Careful.

-I checked the inside. -Yes?

It goes straight, and then there's a corner to the left.

-Here? -Yeah. And then...

Yes?

And in the middle of the straight part,

-there are some clothes. -Clothes?

Really?

Yeah, take a look. I'll open it back up.

Take a look.

Do you see it?

Do we seriously have to go up there?

-You see it? -Yeah.

There's blood there too.

Someone has to go in.

-Really? -Rock, paper, scissors.

-The three of us. -Oh.

Do you want to join?

-Why don't we all go? -There's definitely something.

-We only need one. -Right in the middle.

I'll go.

-No. -Stop.

-If you're going, I'm going too. -You are?

-Get a room, you two. -The couple in chains.

Let's stick together until the end,

make our escape, and finish with a passionate kiss.

I'd like that.

Why would you kiss?

I brought something in case something like this happened.

-What is it? -I brought gloves.

What?

-Are you serious? -Good call.

Could you hand me a flashlight?

He looks so cool with the flashlight in his mouth.

-Just like that? -Be right back.

-Wait. -Yong-jin.

What is it?

Go back.

-Go back? -Yeah.

Holy crap.

-Close it. -What is it?

What did you see?

With the flashlight on,

I saw blood stains on the way to the clothes.

I kept imagining how the monster

must've dragged that body there.

I'm pretty imaginative.

I got so scared that I couldn't go any farther.

I had to go back down to collect myself.

-His room is next door, right? -Yeah.

-Let's look for tongs or anything useful. -Let's try that.

I'll see if it's open.

It's locked.

Let's get that done first.

-What? -It's locked.

-We can't get in. -Exactly.

-It's locked. -We have to grab the clothes.

-If only we had a UV light right now. -I know.

Then I could turn it on and get the clothes.

Should we find a way to turn this thing on then?

That would make this a lot safer.

I'm going downstairs.

-Search this room with me, Do-hoon. -Okay.

I'll wear this just in case.

-You never know. -Okay.

Those two might actually end up kissing today.

I feel like the clothes will hold the key to today's mission.

Same here.

-Either way, we have to go up. -Yeah.

Hey.

-I've been thinking. -Yeah?

The monster eats the head first, right?

Are you saying we should go in feet first?

Well, that could work, but we could just wear helmets.

-It only ate the heads. -Exactly.

I doubt it would resort to eating someone's legs

just because the head is protected.

It only eats heads.

We just have to protect our heads with helmets.

-Right? -Amazing.

You're a genius.

This would be safer.

This isn't connected to power,

so it's pretty much useless.

Nothing to do here.

I'm so worried the monster will pop out of a vent.

-Hey, guys. -Yes?

-Do-hoon and I were talking. -Okay.

-Just tell us if this makes sense. -Okay.

Based on the corpses we've seen,

the monster only attacks and eats the victims' heads.

-Right. -So we thought

-wearing a helmet could keep us safe. -Good idea.

-Sounds good. -Makes sense.

-Right? -Should we go up?

-Yes. Let's go. -Okay.

-Watch your step. -Okay.

-Don't take this the wrong way, Eun-ji. -Okay.

But you don't want to go in, do you?

I'm just asking.

I'll go.

No, Do-hoon and I got it.

-Let's all grab a helmet. -Okay.

-Do you see one? -Where is it?

We'll definitely be safer with helmets on.

Where are they?

There's one here.

Here.

Thank you.

-Good. -Good.

-This is good. -There we go.

Do you have a helmet?

-Right here. -We don't all have to wear them.

But who knows?

It might eat you two and come for us.

You can keep it on.

-I hope this helmet's a good one. -You got this.

Here goes nothing.

-Be safe, Do-hoon. -Okay.

-Remember the wagon, Do-hoon? -You got this.

Do you remember us?

-I'll always be with you. -You gave me strength.

I'll be with you now.

-Okay. -Let's go.

But don't block my way out.

Of course not.

I wouldn't do that.

He's my Wagon Brother.

As long as we're together, nothing can scare us.

He can always depend on me, and I can depend on him.

Nothing can scare us.

That's how strong our bond is.

-It's not unlocked yet. -It's still closed.

Light?

No, I'll just quickly grab the clothes.

Careful.

Careful, Do-hoon.

-I feel like the monster's up there. -Yeah.

It's pretty far away.

Light the way for him.

He's moving.

Take it slow.

Pull it.

Slowly.

I didn't see the monster.

Well done.

-It wasn't nearby. -Nicely done, Do-hoon.

Good job, Do-hoon.

-Did you see anything? -Was something up there?

It was too dark to see.

-Really? -Let's check the clues.

-Here it is. -Who is it?

Jang Man-gyeong.

-We were right. -The chairman?

JANG MAN-GYEONG, CHAIRMAN

Let's keep looking.

-We might've missed something. -I think that's it.

That's it?

Is there nothing else?

But we need to unlock the door to his room.

-There has to be more. -I know.

Did you leave something out? Maybe a key?

Let me check.

-Help me up. -His door is locked.

We need a key.

Yeah, so we need to find a key.

You see anything?

No, nothing that looks like a key.

-Can you check his clothes again? -Okay, we will.

Where could it be?

-Wait. -What is it?

-It's here. -We found it.

Let's close the vent.

Let's go.

Open it up.

So this is where he stayed.

The chairman's room.

-I'm so scared. -Do you want a helmet? Just in case?

I have a bad feeling.

-Where's the... -What?

-The safe. -The safe!

-Yeah, the safe. -And the cigarettes.

Has anyone seen my cigarettes?

Cigarettes?

I saw what was in the safe.

-The safe? -Your contract with Star & Stone Industry.

I don't see it.

Should we check the upper cabinets?

Can you stand on that chair?

-They're locked. -They are.

-Are they locked? -Those too?

-Let's move on. -They're locked.

Could this be something?

-It must be. -It's a card reader.

You're right. Let's scan Man-gyeong's ID.

I thought if we tapped the ID on it,

one of those doors would open and reveal the safe.

Is it something else?

Did we find anything else?

Come on, don't fail us.

But nothing happened, no matter how many times we tried.

Behold.

What do we do?

What other card could there be?

We need to find the cigarettes.

Maybe the card is in the pack.

-It would fit perfectly. -That's right.

-We need to find the pack. -Yeah.

Where could it be?

Yes, the cigarettes!

Cigarette packs have just enough space for a card to fit in.

Sim Hye-sung probably found the cigarettes

and hid them somewhere.

And when Jang asked him where it was,

-he already knew where the safe was. -So he told him.

Sim Hye-sung must've already taken the cigarette pack

and managed to open the safe with whatever was inside it.

-Right. -Yeah.

Just a friendly reminder, agents.

We only have two hours left.

We're running out of time.

Cigarettes.

Cigarettes.

SIM HYE-SUNG

Cigarettes?

Cigarettes...

This one's locked.

Is everyone else's locked?

I found this in this room.

It was Sim Hye-sung's recorder.

-I'm sure of that. -Okay.

But look. There's a lock here.

Here.

Isn't it suspicious?

The shelves in the other rooms don't have a lock.

I found a suspicious cabinet when I went back to Sim Hye-sung's room.

So I started looking for a key.

-There should be a key here. -Wait.

Maybe it's in his pockets.

Let's look there.

Where would I hide it?

If I were him?

It's just suspicious.

We'll have to find the key.

-I found it. -Where was it?

I found it.

-Where was it? -Smothered in blood.

-In the corner. -No way.

Let's go.

What a relief.

-You're on a roll today. -Seriously.

-Let's go. -So observant.

When I grabbed the key, I noticed it was hanging from a necklace.

And this monster eats heads, right?

It must've fallen off when it ate his head

and ended up in the corner of the cabinet.

-Thank goodness. -This whole thing is...

-It's too deep. -It really is.

You're on fire today.

You're amazing, Yong-jin.

-Beautiful. -Well done.

I was surprised myself.

Open it.

Found the cigarettes.

-Let's go. -Finally.

-What's this? -A card.

-What? -Is it a picture?

My heart's racing.

Anybody up for a smoke break?

-We finally found them. -They're real cigarettes.

It's a picture of the contract.

Is it a picture of the safe?

-He took a picture of the contract. -Yes.

We should open the whole pack.

-Right there. -There should be a card.

-Okay. -Okay.

-Let's tap the card. -Here it is.

-Let's go! -Here it is.

-We'll find something new. -Let's go.

The key to the server box is also here.

Great job.

That's where it was.

-Okay. -Here I go.

Jeez.

I thought something was going to fall on me.

-The safe should be there. -Come on, Do-hoon.

-What's that? -The contract is in there.

-The contract? -Mind your head.

I see.

-Okay. -Is that it?

-Is the key there? -Another key?

-To the server box. -On the first floor.

Open the envelope.

Here it is.

It's the contract for the Living Weapon Project.

"Jang Man-gyeong must not disclose research materials

and any other significant proprietary information

obtained while carrying out the Living Weapon Project,

initiated by Star & Stone Industry,

and he must fulfill this contract to the best of his abilities."

"In exchange for mobilizing

the Research Council's intellectual and human resources

in support of the Living Weapon Project,

Jang Man-gyeong will be provided The Midas, a deep sea submarine,

as an investment from Star & Stone Industry."

"Jang Man-gyeong must not disclose

any confidential information and intellectual property

to anyone, including the Council,

without the approval of Star & Stone Industry."

"If the Living Weapon Project is completed successfully,

-he will receive..." -How much is that?

One, ten, hundred, thousand, ten thousand...

He'll receive $10,000,000.

-How much is that? -About 12 billion won.

Wow.

-So this is what it was. -I guess he had his own problems.

Yeah.

But this is terrible.

-Yeah, he shouldn't have signed it. -Exactly.

Selfish bastard.

He sacrificed the lives of his colleagues for 12 billion won.

He went blind with greed.

What's this?

-It's a code. -What's this?

It's blotting paper. The kind we use for skincare.

It must be a code.

-We found everything we needed. -Yes.

-We did. -We can go to the first floor.

Let's go.

How did you think of looking there?

-Are we done up here? -I don't know.

That was the only place I could think of.

And it really was there.

-Do we have everything? -Yes.

-Be careful. -Should we put that in the bag?

No, it's all right.

-You go first. -Okay.

This is where Eun-ji got soaked.

-Right at the beginning. -Like at a water park.

All right, guys.

-Let's open it. -Let's open it.

-Let's go. -Let's do this.

I feel so much better knowing the monster is far away.

It could still follow us down. You never know.

It's fine. We closed the vent.

-Hey! -Close it!

-Say "Behold"! -Behold!

-Behold! -What was it?

-Hurry! -Close the docking room door!

-Behold! -Behold!

-Close the partition! -What was it called?

-Behold, close the cockpit... -Please close it!

-The cockpit... -One at a time!

-Close the cockpit door. -The emergency...

Behold, close the cockpit's emergency partition!

Close the emergency partition!

We saw the monster at the end of the corridor

as soon as we entered the cockpit.

It came out of nowhere.

Everyone was screaming on top of each other.

-Close the partition! -What was it called?

-Behold, close the cockpit... -Please close it!

One at a time!

Someone was screaming complete nonsense.

I kept saying "emergency parliament."

My mind went blank.

We had already rehearsed

what to say to close the door after we said "Behold."

-Close the docking room door! -Behold!

-Close the partition! -What was it called?

Behold, close the cockpit...

-Close the cockpit's... -One at a time!

But at that moment, I completely forgot what to say.

-My mind went completely blank. -Same. What was it again?

-"Emergency partition." -Right.

My heart.

-Should we open it? -Okay.

Where's the key? Oh, Karina has it.

-External drives. We need to take these. -Yeah, these are it.

-I'll put them in the bag. -They look heavy.

-I'll take it. -I'll be fine.

-How do we escape? -Hang on.

We're not going through the vent, are we?

-Done. -I'll carry it.

Keep at it.

There's no way we can go through here.

We can't fit through.

Emergency alarm.

Oh, I remember this.

SUBMARINE TILTING DETECTED CHECK BALLAST TANK

We have to work with the valves.

There's more water on one side.

-Submarine tilting detected. -Hold on, guys.

For your safety, all emergency partitions have been closed.

-Just turn the water valve. -Just water?

I'll try to let out the water on my side.

-You should try adding more. -Hold on.

Hold on to this, Hye-ri.

I'm getting dizzy.

Careful.

You need to add water to your side.

-It's your side. -Okay.

The other way, Yong-jin.

-Other way? -Yes.

Okay, I got it.

Put the backpack down. You'll hurt yourself.

-Careful. -Watch out.

-Come here, Eun-ji. -Here, Eun-ji.

-Come here, Eun-ji. -I'm all right.

I'm holding on.

-My goodness. -I'm so dizzy.

Shouldn't we close up your side?

-Close it up? -Try it.

Close up your end, and I'll loosen my end!

-I've been opening it this whole time. -I'm so dizzy.

-Oh my gosh, are you okay? -I'm good.

Come here, John.

This can't be happening.

-What do we do? -Wait.

SUBMARINE TILTING DETECTED CHECK BALLAST TANK

The water...

No, the air...

You need to let water out on your side.

I've been doing that.

Now add air.

-Add air? -Yes, I'll keep releasing water over here.

-Oh my gosh. -Be careful.

It's almost completely sideways.

Stuff came falling out of the cabinets.

Bags of popcorn came flying at us,

followed by a blanket and a neck pillow.

I was like, "Is this how I die?"

Look, the water...

The door's locked, right?

-It's locked. -We're fine.

Due to a system error, the ballast tank cannot be automatically stabilized.

See?

It must now be stabilized manually.

-So now it'll work. -Please balance the ballast tank manually.

-Now we can do it. -I see.

-Okay. -Let's do it.

-All right. -Release the water on that side.

-And let more air in. -Okay.

-Do we let more air in here? -No, let water in.

-Yeah, more water. -And release air.

How about here?

Release the water and let more air in.

-Less water and more air. -Yeah.

Let more air in.

And on this side,

we'll fill it with more water.

Is this working?

It's working.

-Is it working? -Is it?

Wait, am I seeing it wrong?

Submarine balance stabilizing.

Right on.

Please wait until it is completely stabilized.

-Hold on tight. -Careful.

-Hold on. -Karina, you should go here.

-Go to that wall. -Here?

-Lean on this wall. -Get up here.

Place your feet here, Karina.

Just stay there.

-It's so chaotic. -This is wild.

The calendar is hanging sideways.

-This is insane. -This is crazy.

-What was that? -I didn't see this coming.

-Me neither. -Seriously.

Thankfully, we had already figured out

where the water and air valves were.

Right off the bat, Do-hoon was able to see the screen, take control,

and tell us which side needed more water.

Wait.

The monster must be out there.

-How do you know? -That's its shadow.

-Isn't it? -It's okay, the door's locked.

Come on.

-It's relentless. -All right.

-We only have an hour left. -An hour?

The Teleport Chamber is open now.

We have an hour to get in.

-Do we have everything? -It should be open now.

-Okay. -Submarine balance stabilized.

All emergency partitions can now be opened.

-No! -That's not good.

Would you like to open them?

-No! -No!

-Behold, no! -No.

We've got everything we need, don't we?

-That's right. -We have to increase the oxygen level

or use the UV lamp...

A new email has arrived for Chairman Jang Man-gyeong.

Behold, open the email.

The message is encrypted as requested by the sender.

-That's what this is for. -Please state the special security code.

-We need the code. -Security code?

There were these symbols on the screen.

We thought there could be a connection between the symbols

and the paper we found in the chairman's room.

Try placing it on the screen.

-Here? -Yeah.

Something might line up.

Yeah, let's see.

What could this be?

-I don't think that's it. -No?

Should we look for these shapes?

-See these symbols? -Yes.

The second one is the strangest to me.

There's nothing like it on the paper.

But there is this one.

-Put four of these together... -Another one there.

-That one? -Yeah.

Let's look at the other symbols.

-The fifth one's strange too. -Yeah.

There are several triangles that could make up the fifth symbol.

A triangle pointed toward the left,

one toward the right, and one that's pointing up.

And this is the bottom part, isn't it?

I think so.

-That's all of them. -Yes.

Three triangles and this shape.

-Now, the fourth symbol. -Okay.

It's a combination of these shapes.

-I see it. -The semicircles.

You're all so smart.

What about this one?

That's made up of so many crosses.

It could be made up of V's.

Don't we just need straight lines? Actually, never mind.

Karina could be right.

-Maybe it's made up of V's. -They're the same length.

-Mark them with triangles. -Karina's right.

-The V's? -Yeah.

There are these two.

-And these two, right? -Yes.

Something doesn't feel right.

-It doesn't add up. -I know.

Look at this.

-There has to be a pattern. -For instance,

we should be able to find letters that sit in the middle

or an alphabet by connecting all four.

-But I don't see anything. -Exactly.

What could it be?

Cross, cross, cross, cross.

The first one is made up of four crosses.

-I'll mark the first one. -Four crosses? That's amazing.

-Two crosses here. -I totally missed that.

Do you see any more crosses?

After looking at it for a while, I spotted crosses.

I realized that the first symbol was made up of four crosses.

-Let's look at the second one. -Okay.

-This one is a bunch of U's. -Yes.

We're sure of these three.

Can you mark them with hearts?

Is that all of them?

Yes.

Maybe we should draw lines, even if they're not accurate.

This is the first one.

Where's the other one?

T.

These two lines intersect at the letter W.

-W? -This might be it.

Maybe it's where they intersect.

-Like this? -Yeah.

-That's an R. -This might be it.

The third one is an R.

Then the fourth one goes like this.

-It's an L. -L.

-I think this is it. -I agree.

-We're close. -Is it "world"?

-W, O, R, L, D? -Let's keep going.

-The next one. -I got goosebumps.

And these lines...

-D. -You were right.

It's "world."

Amazing.

Do-hoon!

-Wow. -Great job.

That was brilliant.

Good job, Do-hoon.

Do the honors. Say "Behold."

-Behold! -Yes?

-We have the code. -That's right.

W, O, R, L, D.

-Opening a new email for Chairman Jang. -Yes!

-Do-hoon! -Do-hoon!

-You're amazing. -You did great.

It was John's idea to find the intersections.

Well done.

-Let's take a look. -What does it say?

Received on December 12, 2023, at 9 p.m.

"From Star & Stone Industry."

"Greetings from Star & Stone Industry."

"The Living Weapon Project will be terminated effective immediately."

"As per the signed contract, all documents and research materials

will be discarded automatically within ten minutes

of this email being opened."

They'll be discarded.

Behold, scroll down.

-This was received on December 9, 2023. -December 9th.

-Three days before the previous email. -Right.

-December 9th. -When was the one before?

That was December 12th.

The emails were in reverse chronological order.

"Reporting from the Midas."

"Urgent! The submarine is in a state of emergency."

"Moments ago, Ahn Joo-hyoung, code name UML-02,

-was in the process of mutation..." -UML-02?

Isn't it UML-01?

"...when he killed Ji Young-koo and escaped."

-I see. -Ji Young-koo.

"We presume that he is hiding somewhere in the submarine."

"The lives of the remaining four crew members are in danger."

"I request the termination of the project and the rescue of the Midas."

Behold, scroll down.

-December 8th. -December 8, 2023.

"Your message has been relayed internally."

"This is our official response."

"First, Ahn Joo-hyoung, who has fused with UML-01,

will now be designated UML-02."

So the creature they were experimenting on was UML-01.

-But it fused itself with Ahn. -Right.

-And it became UML-02. -Exactly.

"Second, your request for the Midas's return has been denied."

That makes sense.

"Continue your observation of UML-02's mutation..."

Behold, scroll down.

"...and conduct any possible experiments within the submarine."

That's ridiculous.

-December 8, 2023. -December 8, 2023.

"Reporting from the Midas."

-This was sent at 2 p.m. -Okay.

"Ahn Joo-hyoung, who was in a coma, has begun mutating."

"Externally, his skin has turned dark and is perspiring unidentified liquid."

"Additionally, he presents unique traits that are contrary

to our previous experiments."

Behold, scroll down.

"First, UML-01's reaction to UV light."

Ultraviolet light.

"UML-01 has developed

a tolerance to UV light after it fused with a human body

and is no longer affected by it."

"Second, UML-01's reaction to CO2."

"Contrary to its initial hyperactivity at high CO2 levels,

UML-01 is now weakened by high CO2 levels after going through its mutation."

The creature had changed since the earlier reports we saw.

Initially, we read that UV light was its weakness,

but it had mutated to develop a tolerance for it.

We also found out that it's weakened by exposure to CO2.

We figured out that we needed CO2 to defeat the creature.

It used to be more active...

It used to be more active at high CO2 levels.

-I see. -But now, it's the opposite.

-Because it's inside a person. -That creature...

-So we need CO2. -The creature fused with a human,

so it became more like a human.

-Hey. -So?

What do we do?

-The fire extinguisher? -What for?

Could it be?

FIRE EXTINGUISHER CARBON DIOXIDE, 23 KG

Carbon dioxide. This is it.

-It is? -We have to spray this at it.

I was focused on observing our surroundings.

That's all I was thinking about.

When I turned the fire extinguisher around,

I saw that it contained carbon dioxide.

We need...

Torpedo alert.

Torpedo?

-Seriously? -We have to use this.

-Makes sense. -Torpedo alert.

We'll spray this at the monster.

-A torpedo has been detected. -Grab everything.

-Torpedo inbound. -Wait.

-Impact in five minutes. -Get the bag.

-The bag. -Let John carry it, Eun-ji.

-It's really heavy. -Are we ready?

Let's test the extinguisher.

Try it, Karina.

-I took the pin out. -Careful.

-You know how to use it? -Spray it once the door opens.

We should test it first.

-That's it. Just hold it down. -What was it called?

-Emergency partition. -Okay.

Behold, open...

-Oh my god! -Wait a minute.

-Stay calm. -Yes, go ahead.

-Is everyone ready? -Yeah.

-First, spray the extinguisher. -My hands are shaking.

-And once it's weakened... -We run.

Just stay calm.

-Spray as you walk. -Not yet.

Open, spray, weaken, and run.

-Emergency partition. -Impact in four minutes.

-Let's go! -Let's go!

Behold!

-Open the cockpit's emergency partition! -Open up!

Spray it!

Keep spraying! Let's go!

-Keep going! -Go!

-Keep spraying! -Run!

Good!

-Good job! -You're doing great!

-Keep spraying! -Keep going!

-Watch your step! -Open the hatch.

Open the hatch!

-Everybody, get in! -Karina!

Get in!

We got everything.

I told you!

Good call, Yong-jin.

Subtitle translation by: Ji-hun Lee