Original subtitles

[screeching]

[♪ mysterious music]

[Ena] Yanghee Seo definitely killed Chimok Kang.

So why did I get a puzzle piece?

The puzzle murders had nothing to do with Chimok.

[door closes]

[heavy breathing]

Yanghee was the one who killed Chimok.

I'm sure Yanghee killed Chimok.

So it couldn't have been him.

What's happening?

What's going on?

[heavy breathing]

[♪ theme music]

Nine Puzzles

Why did you come to work so early?

[sniffing]

Ew, I smell booze.

Were you up late drinking last night?

I'm always here early.

How about you?

Looking at these red lines,

they know exactly how the body was chopped up.

I think whoever sent these puzzle pieces to me is probably the killer.

That info was classified, right?

What are you talking about?

This case was all over the news. Would've been pretty simple to find out.

You're wrong.

These are the exact parts mentioned in the autopsy report.

That kind of info doesn't make the news.

[captain groans]

[captain] That's weird.

It looks like they could've drawn over an older drawing.

[Ena] I noticed that too.

And what that tells me…

is that Chimok Kang was the real murderer's main target all along.

But why didn't they kill him with their own hands?

You think they let him go?

Or maybe they enjoyed watching the guy?

Slow down a bit and let me think, okay?

One thing's for sure now though.

-What's that? -That each one of these puzzle pieces

portrays one of the victims of these serial killings.

The gun, the whisper,

and the armband.

You got a point though.

Why didn't they kill them in person?

Could it…

have to do with their motivation?

[sighs]

[♪ inquisitive music]

[engine revving]

[door closes]

Good to see ya. How've you been doing?

[chuckling]

It's good to see you too.

Honestly, I was getting pretty bored in here.

[thumps]

[♪ tense music]

What's that then?

I've never seen anything like that.

It does show the same exact spots that I cut though.

[soft chuckle]

Wait a minute.

Are you trying to tell me that I wasn't the only one

who was out to murder my husband?

That's right. Could you tell me if there was ever a time

that you felt as though you were being watched or followed?

They seem to have known that you were out to kill Mr. Kang.

They've been watching.

Whoa…

I had no idea that I had an audience.

[gasps]

At the reservoir.

I had a feeling that I wasn't alone up there.

But who was it?

-[rattling] -[squelching]

[Jaewook grunting]

[Jaewook and Yanghee panting]

[sighs]

One thing I'm damn good at is noticing those tiny details.

Now how did you find that little suitcase?

I was pretty sure no one would find it out there.

That wasn't the hard part.

There were some tread marks at the entrance.

That's weird.

The two of us carried it there.

[indistinct chatter]

[worker] Yeah, I don't know man. The police captain told me to wait.

-How long do you think this'll take? -I dunno, could be a while.

-Hey, sir. -Oh, hey, sir.

[camera shutter beeping, clicking]

-What's the story? -[inspector 1] Hey.

[sharp exhale]

Well, looking at the redness of the mucous membrane

and the vomit around the mouth,

I'm guessing the primary cause of death was poisoning.

'Round what time did he die?

I'd say between one and three this morning.

He was already dead when the call came in.

[inspector 2] Got it. See if we get anything.

[♪ soft tense music]

The gun, the whisper, and the armband…

[sharp inhale]

What the hell are they trying to tell me?

[Ena] Oh?

How you doing?

Has forensics finished up yet?

Just about.

[Ena] Good. Have your sessions been helping?

Just so you know, Dr. Lee's better than Doc Hwang.

What?

[partner] Huh? Sessions?

What does she mean? What sessions?

Uh, I dunno what she's on about.

[partner] Huh?

[Ena] Hey there. You guys doing all right?

You don't look too pleased.

Look who it is.

Oh, you're happy to see me.

Why are you here? Aren't you busy?

Yeah, why?

This is a pretty standard case.

-We don't need a profiler. -[sucks teeth]

Let's just say I'm here to satisfy my curiosity.

Do you mind if I look around?

Is that allowed?

Where are those three that drank with the victim?

[Hansaem] Yeah, our three guys.

The first one, who called the police, is at the station now,

being interviewed by San.

And Youngha's gone to meet with the other two.

We've given all three a tox screen,

though they haven't shown any symptoms yet.

I'm gonna check the camera footage.

Yeah, get the CCTV footage.

Curry Kim.

What's taking so long?

What do you mean?

Are you still not finished profiling me?

Am I really that hard to read?

Let's talk later, okay?

[Ena] There was only one entrance.

And the CCTV system had a clear view of it.

The perfect sealed room.

And yet, a killer…

was able to poison someone.

[bottles clinking]

Mm… Scratch that.

There were no poison containers found at the scene.

The killer wouldn't have poisoned the drink in front of people…

which means they spiked the drink in advance.

[slurps, gulps]

They made the victim drink the poisoned soju by himself.

He didn't suspect anything or put up a fight.

[gulping]

They couldn't have done that, not without a really solid plan.

[faint crackling]

[victim choking]

[victim groans]

Detailed and careful planning,

cold and calculated execution,

and a high degree of self-control.

All of these traits are a match…

for the Puzzle Killer.

Hang on a minute. Can you zoom in a little?

[♪ foreboding music]

[♪ suspenseful music]

Are you able to fast-forward it?

Seems the only people in or out were the three of them.

Let's go talk to them.

At first, I just thought he was sleeping.

When I woke up in the morning, it was 8:00…

Uh, I mean, it was almost seven.

And, um, I shook him to wake him up.

We had to get to work.

But something wasn't right.

He wouldn't wake up,

so I reached out and grabbed his hand, like this.

His hand was…

really cold.

So I was like, "What's going on?"

And took a closer look at his face.

That's when I noticed…

that he wasn't breathing, you know?

Then I called the cops, yeah.

Younghan returned to work yesterday,

so we all got together for dinner and a drink.

Guess we started drinking around eight, after we clocked out of work.

My wife didn't want me to stay out late.

I kept telling her that I was leaving,

and I got into a huge fight with her on the phone.

Around 1:00 a.m.

Wanna know who bought drinks?

Yeah, I bought the makgeolli.

The soju as well.

I don't normally drink soju though.

I also bought some canned peaches,

kimchi, and some peanuts too.

Snacks, right?

Uh, then there was the instant noodles all of us ate for dinner.

Jungchul brought those.

Um… [sharp inhale]

I don't, uh, remember exactly what time it was.

But, um, when I got back from the bathroom,

I saw that Younghan and Jungchul were sleeping already.

Gabje wasn't around.

So, uh, since there was no one left to drink with,

I… just went home.

And then, when I got to…

work in the morning…

they told me that Younghan…

was found dead.

[sobbing] So, like…

did someone poison him intentionally?

Their testimony does line up

with the CCTV footage recorded at the scene.

[deep inhale]

So which one of 'em did it, hmm?

None of these guys looked like they were lying.

Let's not forget that those guys worked with Younghan Choi for more than a decade.

And yesterday was his first day back after taking a year sabbatical.

Almost like they waited to kill him till he came back.

How about his family? You get ahold of 'em?

Uh, well… [sharp inhale]

His wife passed away five years ago.

And his son died last year, so there was no one to contact.

[sighs] So are you just giving up?

See if he's got a sibling or some relatives.

-Get in touch with them. -Yes, Captain.

[Jungchul's wife] Oh, come on.

Shouldn't the first people you call when something bad happens be family?

That should be the way, right?

I'd call 911 if I found somebody unconscious.

Sure, I get that.

But he just found a body, I betcha he called me first

because he wasn't thinking straight, know what I mean?

Anyway, he called me on the phone

and kept telling me that Younghan wouldn't wake up,

and that he didn't know what was wrong.

And then, I told my husband to call the police,

and that's exactly when he called.

Look, my husband didn't do it.

Didn't do what?

All I'm saying is he doesn't have it in him to harm someone else.

Aha, the cause of death hasn't been released,

but you seem to know a lot.

I'm his wife, of course I know a lot.

What, did you think he just kept me in the dark?

Oh, and I'd just like to add, 'cause you'll find out anyway.

It's true that my husband borrowed money from Younghan,

but it's all been paid off now.

So I hope you don't get any wrong ideas.

Who told you about that, huh?

I betcha it was Gabje or Deokmun, wasn't it?

Deokmun's a prick.

[Jungchul] Yeah, it's true.

I borrowed a bunch of money from Younghan, okay?

But I always paid him back every month.

I was down to, like, three million. What d'ya think?

You think I killed someone over three mil?

Then why the hell would I've paid back the seven million?

You think I'm an idiot, huh?

I really just wanna help you.

Look, obviously, that asshole Deokmun is the one.

You said the soju was poisoned. The soju, right?

Well, Deokmun was the one who took it out of the fridge, 'kay?

And here's the kicker.

He didn't drink any!

And then, at some point, that son of a bitch woke me up

just to say he was leaving.

I mean, he normally just leaves when he gets too drunk.

Why the sudden change, huh?

Why, huh? Is it 'cause…

he needed a fucking alibi or whatever the fuck you call that?

Oh, fuck this shit, I mean… I swear! 'Kay?

He was the fucking one who put this whole goddamn night together!

Ah, shit, I'm so fucking pissed right now!

[Lt. An] Do you know this guy?

[shop owner] Yeah, I do. That's Mr. Lee.

Yesterday, he bought some soju,

three bottles of makgeolli, some pig trotters,

some kimchi, and a few other things.

How do you remember it so well? Did you pick it all out yourself?

Hey, it was only yesterday.

That dude comes in here a lot.

[sharp inhale] He normally just buys makgeolli

without any snacks, but…

he bought snacks and soju yesterday.

So I thought to myself, uh… "What's his deal?"

What time did he come by?

Gimme a sec. Lemme have a look.

He was here at 7:42 p.m.

Oh, he bought a bunch of other stuff.

Peanuts, peaches,

lip balm, and wet wipes.

Didn't Deokmun arrive at…

the break room at around 20:16 or so?

That's right.

It took him 34 minutes to get there? It's a five-minute walk.

Captain, we have the cause of death.

Apparently, it was nicotine poisoning.

Nicotine?

Yeah, anything above a 3.7-milligram blood-nicotine level is lethal,

and tox showed his level was higher than 5.9.

And they found traces of nicotine in the soju bottle.

As for Deokmun, Jungchul, and Gabje,

their tox screenings all came back negative.

The hospital just told us.

That means… that Younghan was the only one who consumed the nicotine.

Yeah, it sure looks that way.

Uh… Gabje Kim smokes though. He smokes e-cigarettes.

Yeah.

His brother-in-law owns a vape shop, doesn't he?

All right, let's just think about it a second, 'kay?

Okay, let's just say, uh…

Let's just say I really did it. I wanted to kill Younghan, 'kay?

Pretend you're me for a second, detective. Would you use nicotine to do it?

Most killers gravitate towards tools they're used to using.

[frustrated sigh]

I just didn't do it! [laughs]

I was seriously just going to show up to say hi and then leave.

Look, the only reason that I ended up staying there late

was 'cause Younghan asked me to.

[groaning]

Hang on a minute.

You should talk to Jungchul.

Younghan lent him some money recently.

I bet he hasn't paid him back.

[sharp inhale] They were together until the end.

To sum things up,

we know that Gabje made a bulk order of nicotine about a month ago.

And Jungchul was with the victim till the very end

and had financial dealings with him.

Deokmun has a 34-minute gap in the day,

and he took the poisoned soju out of the fridge,

yet chose not to drink any of it that night.

Gabje suspects Jungchul of foul play,

and Jungchul suspects Deokmun. Is that it?

[snaps fingers]

Deokmun did it.

[Lt. Ro] Look…

I think we could all agree that the soju is what killed the guy,

and Deokmun Lee was the only one who had anything to do with it.

He purchased the soju, he brought the soju,

he served it, and he didn't drink it.

-I'll have to go with Sukwang on this one. -[Lt. Choi] Right.

Besides, those 34 minutes really bug me.

We can't find anyone who met with him or anything.

Hey.

Yeah, but… [sharp exhale]

…what was Deokmun's motive?

[Hansaem] Huh?

I agree, he's a prime suspect,

and I agree that the missing 34 minutes is suspicious,

but what was his motive?

Younghan Choi may have been an introvert,

but he took good care of his friends and the people he knew.

He even gave them New Year's presents every year.

We know Deokmun looked up to him 'cause they were from the same town.

The two of them didn't have any bad blood.

Did Lieutenant Yoon say anything, motive-wise?

I'm curious 'cause she came by. [chuckles]

You punk!

Why would you even ask that?

All we gotta do to end this

is to find the evidence and get the perp to confess.

You're a detective, not a… profiler.

I just don't see a motive.

[sighs]

When do we not see the motive?

When we don't have enough evidence to work with?

Wrong, that's not the answer.

Since when did she need any evidence?

She solves the case at the crime scene.

Could there have been something off with the crime scene?

Wrong, that's not the answer either.

There's no such thing as an "off" crime scene

unless it's been tampered with.

[sharp inhale]

You're right.

I guess this could be similar to the Chimok Kang case.

A scene that's been tampered with.

Captain,

you're a genius.

You just figured that out?

Curry Kim, what are you doing here?

I figured you might show up.

[soft chuckle]

[soft grunt]

[sharp inhale]

Do you know why people kill other people?

Some people kill because a stranger they just met a minute ago

won't lend them 1,000 won,

and some kill 'cause the laughter of a stranger they hear

while out on a stroll rubs them the wrong way.

Do you think one of our three suspects is the killer?

Are you saying they're not?

Motive.

Oh, there might not have been one.

So… you're telling me the killer had no motive

when they made the victim drink poisoned soju?

The motive might not be clear, but there had to have been one.

You're a smart cookie.

You've read some detective novels? [chuckles]

You ever read the Agatha Christie novel, Crooked House?

No.

Well, in that story, there's a murder in a sealed room just like this,

and every family member on the scene has a strong motive to do the deed.

Can you guess who it was who killed the grandpa?

I shouldn't tell you, it'll spoil it.

Out with it.

I won't read it anyway.

The 12-year-old granddaughter was the killer.

Her motive had been obscured by her age.

Someone who was beyond suspicion turned out…

-to be the killer. -[Ena tuts]

How cliché.

Nowadays, there are a lot of cases where the killer is a kid.

[sharp inhale] I guess it's just an old book.

Then how about this one?

The Murders in the Rue Morgue.

The very first detective story, published in 1841

and written by Edgar Allen Poe.

Who was the killer in that sealed room mystery?

An orangutan.

[soft chuckle]

I've thought this for a while.

I think you're losing it.

You're missing the point.

All I'm trying to tell you is that homicide cases

can often be unpredictable like that.

Did you get another puzzle piece?

Come this way.

Where are you going?

-Hey, what's with the… -[beeping]

[door lock clicks, chimes]

Gabje Kim

[Ena] There.

"Gabje Kim"

Now then…

Mr. Gabje…

why did you kill Mr. Choi?

Come on, what the hell are we doing here?

Why did you kill Younghan?

[sighs]

[smacks lips] If I were Gabje, you mean?

[clicks tongue]

-I guess it's because… -[inhales deeply, puffs]

So I got a promotion…

later than Younghan did. Shoot.

I mean, I joined the company earlier than he did.

Do you think Younghan rubbed that in his face?

I'd guess not, knowing Younghan's personality.

Then again…

maybe, um, I may have had a slight inferiority complex towards the guy.

Just like Hansaem Kim?

Mm-hmm.

Whoa, don't do that!

I don't have an inferiority complex.

[sharp inhale] Inferiority complex or not,

he's not someone who would have acted on it.

We're talking about a dude who's so indecisive

that he has to call his wife to ask what to have for lunch.

Aside from that, Younghan was the only person

who recommended Gabje for a promotion.

There was nothing for him to gain.

There's no motive here.

"Jungchul Yeo"

[irritated groan]

[sharp inhale]

Now Jungchul… Hmm, let's see…

Money issues.

You've seen my transaction history, I've only got 3 million in the bank!

I'm innocent, okay?

[munching]

Hmm.

I just don't think that's enough of a motive.

It's not like he didn't work to pay the man back or anything.

The money isn't the issue here.

Maybe if there were emotions attached to the cash.

Although, Younghan wasn't the kind of guy that would've nagged him.

I guess he didn't even charge interest, right?

That leaves us…

with the man your team considers to be the prime suspect.

Deokmun Lee.

Anyone would assume I'm the guy who did it.

I'm the only one who didn't drink the soju.

I took the soju bottle containing nicotine out of the fridge.

Also… my missing 34 minutes.

Want to know…

[softly] …what it was I was doing?

What the heck?

What are you doing?

Are you implying he met his mistress or something?

That's wassup!

I went to visit my mistress, who also works at the factory.

[sharp inhale] That's why I got the lip balm,

and also why I didn't wear my wedding ring that day.

You following?

What are you, a PI?

How the heck do you know he was having an affair?

Do you think Younghan knew about their relationship?

He may have told him to stop seeing her,

and then Deokmun got angry with him for saying that.

[Ena inhales sharply]

But then if we were to consider how impulsive Deokmun Lee is,

we would certainly have seen signs at the scene.

However… there weren't any.

So he didn't do it.

So did you get a puzzle piece or not? Can you answer that?

Detailed and careful planning, calculated execution,

and a lot of self-control.

All of these traits match the puzzle murder suspect.

That checks out.

Uh-huh. So did you get one or not?

[sharp inhale] Hang on…

-That soju bottle with the nicotine in it… -[groans]

How long do you think it had been sitting in the fridge?

I've no idea.

The security footage gets deleted every week.

I'm just wondering what the chances are that the bottle could've been, uh…

somehow put in the fridge in advance.

What if there was a trap being laid for the three of them…

trying to get them to suspect each other?

We shouldn't be looking at these three.

The cause of death is elsewhere.

I think we should expand our search.

I think that Deokmun, Jungchul, and Gabje are quite lucky

because Younghan died in their place.

Are you saying that the wrong person might've died?

[sharp inhale] All I'm saying is we shouldn't rule anything out.

The killer might've born a grudge against all four men.

That could also be true.

[indistinct chatter]

Hey, did they pay you for yesterday?

Yeah, they paid enough. Took my girl out to dinner.

The boss really paid you that much?

Besides the victim and the three suspects,

there's one other person that's been in and out of the break room

over the past seven days.

The janitor, Mr. Yeom.

-Look at this. -[keyboard key clicks, mouse clicks]

-He went in five days ago. -[mouse clicks]

Again, three days ago.

-[mouse clicks] -And even the day before.

[♪ tense music]

I wonder what he's got in the bucket on the cart.

Apparently, he hated that those guys would party together in the break room.

It used to be dorm lodging for the foreign workers,

but they were using it as a break room because it was vacant.

Now Jungchul told me

that he ran into Mr. Yeom on the morning of the incident,

and Mr. Yeom said…

"You seem fine."

[Hansaem] I noticed you went in and out of the break room.

'Course I did, it's my job.

Why's that weird?

I'm a janitor, that's what I do.

Uh, what was in that bucket on the cart? Aside from your cleaning tools.

There was nothing in there but cleaning tools.

A little while back, you bought some nicotine.

So what?

I smoke a vape while I'm at work.

See?

Mr. Choi gave it to me.

Mr. Kim's brother-in-law.

He opened an e-cigarette store, so Mr. Choi bought one of these.

But then, he told me he doesn't smoke.

And he gave it to me.

He told me I should try it.

Is it true you didn't like it when people drank in the break room?

I still don't like it.

But you know…

it's just part of my job.

On the morning that Mr. Choi was killed,

you came across Mr. Yeo.

Why did you say, "You seem fine," to him?

I said that 'cause I rarely saw him that way.

Most days, he was badly hungover.

He looked really awful to me.

I don't know what those three men told you about anything,

but it wasn't me.

Mr. Choi was a really good man.

I didn't kill him, I swear.

Say, uh…

anyone ever tell you guys about what happened a year ago at the factory?

What's bothering you so much?

[deep inhale]

If I…

decided to kill you right now…

what's my motive?

Kill me?

Right now?

Kill me. Huh… [sharp inhale]

I guess that'd be…

curiosity?

You can see that?

I know what kind of person you are, Ms. Yoon.

[frustrated sigh]

Well, why can't I see the motive?

It's hiding from me.

Leaving traces of one's crime at a crime scene is inevitable.

Even if a killer tried to clean up the scene,

we would be able to learn something.

So why… [frustrated groan]

What kind of person was the victim?

It seems to me that…

you've always… looked at your cases from the side of the aggressor.

This time, try looking from the other side.

Put yourself in the victim's shoes and look the culprit in the eyes.

The culprit… had no motive to kill me.

So why'd I end up dead?

Was that person even the culprit to begin with?

Maybe it's time to return to square one.

Details on victim

2022 January 18, death of son Dongkyung Choi

[Ena] That was it.

We should've focused on that from the start.

Mr. Choi's son died a year ago.

Why didn't you tell me that?

[clears throat]

Does that, um…

give you an idea?

[beeping]

[door lock clicks]

[door closes]

[door lock chimes]

[switch clicks]

[dog barking in distance]

[clicking]

[steady ticking]

[switch clicks]

[dog barking in distance]

For a single man in his fifties, living all by himself,

this house is too clean to me.

[sharp inhale] It's so clean that it's weird.

Yeah, this place is a whole other level of tidy.

Everything's been… arranged meticulously.

It seems like he was getting ready to go on a trip.

That's a strong observation, Curry Kim.

You pick that up from one of your novels?

My curry friend's house was just like this.

That friend also lived alone without any family.

They tried committing suicide.

[♪ pensive suspenseful music]

[scoffs]

It was all an act, wasn't it?

[sighs] I guess…

the victim did have a motive in the end.

You said Younghan's son died a year ago, right?

Try asking those three men about it.

Ask them why Younghan Choi might have wanted the three of them dead.

[door opens]

[sighs]

I called you all here 'cause I wanted to ask you something.

Was there anything that would've made Mr. Choi want to kill the three of you?

You got nothing to say?

[sharp inhale] Fine.

Let me ask again.

How are the three of you linked

to the death of Mr. Younghan Choi's only son?

Dongkyung died a year ago, right?

Mr. Yeom's already filled me in a little, but I'd like to hear it from you.

What happened at the factory last winter?

[machine whirring in distance]

-I look forward to working with you. -[Deokmun] Thanks.

[Gabje] Hey, all right.

I told him to relax till he gets to college, but he won't listen.

-[chuckles] -Yeah, well…

I think it's cool he wants to work to pay for college.

You know, he's gonna go far.

-Thanks for the drink. -You're welcome.

[Jungchul] I heard you nailed your entrance exam.

Wow. [sharp inhale]

Younghan, this kid must be your pride and joy.

Hey, you owe us a drink.

All right.

-For real, you owe us a drink. -Yeah, okay, fine!

[laughter]

[♪ foreboding music]

[siren blaring]

[Gabje] Hurry!

Over here! Hurry!

[Mr. Yeom] Mr. Choi wasn't at the factory that day.

He was away on business.

There's an accident and Mr. Choi's son was taken to the hospital.

But by the time the ambulance could get him to the hospital,

it was too late.

The kid was dead.

They said that he got caught in the conveyor belt.

But exactly what happened and how it all went down,

I'm not entirely sure.

Those three guys?

They were there. They should know.

-You can handle this, right? -Yeah, sure.

Uh… are you sure I just use this broom to do it?

That's what we do.

Yeah, you just need to nudge it with the broom

so it doesn't get stuck in the machine.

-And try not to break it. -Okay, got it.

[cell phone ringing]

-Get to it then. -Okay.

I'm coming, okay?

Yeah, you guys get started.

What's that?

Whoa, kimchi, pig trotters, and makgeolli? Sounds great!

-[clattering] -[chuffs]

[machine rumbling]

-[scraping] -[steady rattling]

[relaxed sigh]

-Hey, get over here. -All right.

-Come here! [laughing] -[Jungchul] Let's do it!

[Gabje] It's still warm. Yeah, come on.

-Here. -Ah…

Good work, you two.

-There. Cheers. -Yeah.

All right.

[all slurping]

-Ah, that's good. -[loud clank in distance]

[Dongkyung screaming in distance]

-Oh, shit! -[machine rumbling]

[Deokmun] Dongkyung!

-[Dongkyung screaming in pain] -What the hell happened?

[screaming frantically]

-[screaming continues] -What happened?

-[Deokmun] What do we do? -Shut it down! Go!

-[power winding down] -[Dongkyung screaming]

[Gabje] Hurry up and pull!

[Jungchul grunts] It's stuck! It won't come out!

-[Gabje and Jungchul panting] -[♪ uneasy music]

[Deokmun] Dongkyung!

Ah, Jesus, how did this happen?

Hey, man!

How could you leave this kid unsupervised, huh?

Oh, God, I'm gonna call 911. Oh, Jesus…

Ah, shit.

-Wait, hold up. -Come on!

We should call the boss first.

Why should we do that?

Remember the last time we had an accident? Hassan, that Pakistani kid, you remember?

The boss told us not to make any decisions at all.

He told us to report everything in first, remember?

Oh. Oh, yeah, you're right.

-Call the boss right now. -Okay, I'll call him.

[Gabje] Shit! What do we do?

Should we try to pull him out? Huh? What d'ya think?

Whoa, don't touch him. My God! That's dangerous.

The boss isn't picking up. What do we do?

-Shit! -[whimpers]

[Jungchul] He's not answering.

Look, we didn't leave our stations, all right?

-And we were working with the kid. -Yeah, uh-huh.

[Deokmun] We're all fucked otherwise.

-Okay. -Yeah.

It was quick.

The kid got careless, okay?

-We did nothing wrong, 'kay? -Right.

[deep sigh]

Did Mr. Choi ever blackmail you regarding this?

Did he ask you for money?

No.

Younghan knew that it was an accident.

It wasn't just an accident!

You think Younghan didn't know that?

I've been wondering why he died on the day he returned to his job.

Originally, I thought that one of you three

had been waiting for that day.

When, actually, it was Younghan who had been waiting.

What do you mean by that?

Younghan must have been so angry with you three.

I bet he wanted you all dead.

If you guys hadn't left his son alone unsupervised,

he wouldn't have had an accident.

If you had only called 911 first…

then maybe he wouldn't have downed a glass of soju laced with nicotine.

[sobs]

Younghan… [sobbing]

[Deokmun sobbing]

[sighs]

[♪ soft suspenseful music]

[clatters]

[Deokmun] Stop half-assing everything you do, it's annoying.

[Gabje] Just step off, man.

[coughs]

[Gabje] Ugh…

[sighs] Have a drink.

[Gabje groans]

[groans] We're all out.

[cell phone ringing]

I told her I'd leave soon.

I need to take this. [grunts]

[Gabje grunting]

-[Deokmun groans] -[Gabje] Hey.

-I told ya I'm coming home soon. -[door opens]

-I'll go grab some more alcohol. -[door closes]

I could use the fresh air.

I think there's, uh, some soju in the fridge.

Let's just drink that.

There is? Really?

[Deokmun] Ah, sweet.

[groans]

Here, you go ahead.

I just need to take a leak. Be right back.

[grunting]

[door opens, closes]

[heavy exhale]

[gulping]

[thumps on table]

[♪ suspenseful music builds]

[chokes]

[clattering]

[chokes]

[strained breathing]

[anxious breathing]

[heavy exhale]

He looked too clean for someone who drank the night away.

Then I went to his house, that's when I knew.

That's what confirmed it. His house was the same way.

It was tidied up like he was never coming back from where he was going.

I mean, how would any of that matter once you're dead?

Why would anyone care, you know?

Younghan Choi's house…

was like a stage set for a play.

There wasn't even a family photo hung up on the wall in there,

but there was a photo of the four of them stuck on the mirror above the dresser

as if to draw the audience's attention by shining a spotlight on that spot.

So stupid, isn't it?

Did he really think that he could fool us with all that?

I mean…

he could have just killed them all.

Why did he kill himself instead?

Besides, if he wanted to pin the murder on them so badly,

why not come up with a much better plan?

Right?

I just don't understand the point of it all.

[Dr. Lee] Ms. Ena.

[sharp exhale] Calm down.

I've never seen you get so worked up before.

What is it that's making you get this angry?

All of it!

Hmm…

Sometimes, when people

get stuck in a tough situation,

they may kill other people, or they may do harm to themselves.

This man was the latter type.

He killed himself because he couldn't kill someone else.

[sharp inhale] He could have taken everyone else out with him though.

I don't understand why he chose to only take himself out.

I'd say that he wanted the three of them to…

suspect each other and go to jail.

I imagine he was hoping those three men would be branded as killers.

And I'm guessing that he didn't want this to be seen as vengeance.

As far as Younghan was concerned, those men were murderers.

[sharp inhale] I hear you, but I still can't wrap my head around it.

Mr. Choi was… a man with quite a soft heart.

I mean, he probably didn't have the courage

to watch those men meet their end.

Just like you.

I'm not soft.

You may put on a tough front, but you've got a soft heart.

I absolutely do not.

All right then. Let's just say that you don't.

You should go. I have a dinner appointment to get to.

[sighs]

[beeping]

[door lock clicks, chimes]

[door lock chimes]

[sighs]

Am I playing Mr. Choi this time or what?

Sit down.

Who would've thought it'd be suicide?

I thought this kinda stuff only happens in John Dickson Carr novels.

[sighs]

I heard when folks are in a tough situation,

some of them kill other people,

and some folks choose to kill themselves.

What do you think I would do?

[sharp inhale]

You've been watching me for a while now.

Are you still not totally convinced?

I've got a soft heart, you know?

Tell me now. Answer.

[deep breath]

[Hansaem gulping]

And you answered me correctly.

I'll show you now. Check it!

[♪ soft suspenseful music]

When did you get this piece?

[Hansaem] Wait…

Chimok Kang was cut up like that.

How did they know that?

Maybe 'cause the killer is around us.

We should probably ask them when we see them.

Why was it that they let Yanghee take the kill?

The sender of the puzzle pieces is definitely someone who kills others.

How do you suppose they got to this point?

What do you think drove them over the edge?

Why are the people in the puzzle

shooting at little human-shaped dolls

or holding cotton candy and smiling while whispering?

Why are they dancing while wearing armbands?

Is it that…

the three of them weren't victims at all,

but culprits instead?

Like the case this time.

What?

What if Donghoon Yoon, Miyoung Lee, and Chimok Kang…

committed a crime?

What if there's a case out there where they're the culprits?

And what if there are even more culprits

to be revealed?

We've only got three pieces of the puzzle.

But we could end up with six

or maybe nine of them.

You never know…

we could get a lot more.

[♪ dramatic music]

[♪ dramatic music continues]