Original subtitles

(We mix dramatic imagination with scientific knowledge.)

(All people, organizations, places, incidents are fictitious.)

(Staff ensured the animals' safety in the filming of this drama.)

(Episode 8. Love, the Basic Instinct)

(Seobu Police Station)

Dr. Brain. What's this about?

Is it because of me?

If you get that, stay away.

It is because of me?

Why? What did I do?

Is it because we fought that day?

Okay, I apologize.

What did you do that you need to apologize?

I challenged you to a fight. Late at night.

Didn't I make you angry?

You did, yes, that was why.

Still, I'm sorry.

Detective.

(Second Place)

(Second Place)

Detective.

I...

killed someone.

Who did you kill?

Was it Kim Jae Sook, your wife?

It's so reassuring to have you by my side.

I'm staying to help because the case got extended.

I know, and thank you.

Let me be very clear. This is the last case.

Will you stop it? I said I was sorry.

Hello?

Ms. Kim. Are you all right?

Ms. Kim. Are you coming to?

My husband.

He turned himself in.

Yes. He said he killed someone,

and then he stopped talking.

Who did he kill?

(Investigation in Progress)

He was hit in the head.

I think it was a single blow.

The trophy was the murder weapon.

Why do you think he suddenly killed the neighbor?

That's...

unknown.

Let's ask Mr. Heo.

I'd woken up...

and was coming down from the rooftop after a smoke.

Then I saw him.

We cycle together,

so we hung out a few times.

But he was a bit of a jerk,

so I was never fond of him.

But...

I heard you thought of Cherri as a real woman.

My goodness. This world is full of women.

What kind of loser...

falls in love with a virtual human?

He mocked me. At that moment, I lost it.

So we got into a fight.

You lost it,

so you followed your neighbor into his place...

and beat him up to death with a trophy?

Yes.

At dawn,

when I got home after my workout,

I heard some people fighting.

Turns out, my husband was tussling...

with my next-door neighbor at his place.

Why did you laugh at me?

Why did you laugh at me?

I had a medical condition and even had surgery.

You think it's funny?

- Get lost. - You little...

My husband wanted to turn himself in,

but I told him not to.

I don't really remember what happened after that.

Your husband dropped the trophy, and you touched it?

Yes.

I think so.

(Fingerprint Analysis Report)

This is the trophy, the murder weapon.

It matches the wound on the victim's head.

Two fingerprints were found on it.

One of them belongs to Heo Bum Soo. The other one is Kim Jae Sook's.

As you can see, Heo Bum Soo's print looks clear.

But Kim Jae Sook's is only partial.

She said...

she touched the trophy when her husband dropped it.

Then both of them should be considered suspects.

I don't understand Heo Bum Soo's motive though.

His neighbor laughed at him, so he hit him with the trophy?

He doesn't strike me as the hot-tempered type.

The forensics team conducted a blood pattern analysis.

They think the direction of the blood spatter seems suspicious.

Let's see the photos.

These shoeprints are from Heo Bum Soo's running shoes.

He barged into his neighbor's home with shoes on,

which tells us that he was very worked up.

These are Kim Jae Sook's footprints. She was wearing socks.

The problem is the direction of these footprints.

The blood spatter was found just next to where Heo was standing.

It doesn't match the angle at which the neighbor's head was hit.

I think it's possible.

Enough talking.

Let's do it.

- There. - Okay, got it.

All right. We'll follow the details mentioned in his statement.

The victim and Heo Bum Soo argue.

The moment the victim mocks him and turns around,

Heo Bum Soo loses it...

and hits him in the head with the trophy. Okay?

Sounds good.

Goodness, wait. What was that?

Will you actually hit my head with that?

I must, to figure out the exact direction of the blood spatter.

Goodness. I won't do this. I refuse.

Dr. Brain, you play the victim.

I look nothing like the victim.

You don't look like Heo Bum Soo either.

And I don't look like Kim Jae Sook.

Be quiet!

The roles match your personalities. Just do it.

Dr. Brain.

Don't swing that thing yet.

Gosh, this is making me nervous.

Be gentle, okay?

All right, here we go.

Action.

I heard you thought of Cherri as a real woman.

My goodness. This world is full of women.

What kind of loser...

falls in love with a virtual human?

You...

I will crush your head!

(Victim, Heo Bum Soo)

(Kim Jae Sook)

Cut!

That was no good.

Dr. Brain, who said you could make up lines as you went along?

I can't improvise?

Just hit him with that trophy.

What's with this overenthusiasm?

All right. Let's do it again.

Goodness. Being a director isn't easy.

Okay, let's try again.

What kind of loser...

falls in love with a virtual human?

If Heo Bum Soo hit him from that side,

we should've found some blood on Heo Bum Soo's clothes.

But we found none.

Blood was only found on the floor, between the two of them.

Then based on the direction of the blood spatter...

It's more likely that I hit him.

(Kim Jae Sook)

It's not for certain yet,

but based on the angles and the direction of the blood spatter,

it's more likely that Kim Jae Sook hit him.

So...

they're lying to us?

Let's see what their brains want to tell us.

No, I don't want to do that.

You see, I've been under a lot of stress lately.

All of a sudden, I'm experiencing these symptoms too.

I cannot take a polygraph test...

in my current state.

If you refuse to take the test,

you may seem suspicious.

Even if you suspect me, it can't be helped.

At the moment, I'm in no condition to take the test.

Sure, that's fine.

I'll take the test.

We'll get started now.

Who hit him with the trophy?

Mr. Heo.

Who hit Mr. Lee Chang Yong with the trophy?

It was me.

I did it.

It says he's telling the truth.

Goodness. What is going on?

(Neuroscientific Investigation Team)

Oh, boy. So he killed him?

You can certainly fool a polygraph.

It's easy to fool a machine,

but you can't fool your brain.

You see, the brain is...

Nice.

What are you doing here?

Hi, honey.

Hey, what is this?

Oh. When I met her at the award ceremony,

I asked her to come and install this for us.

I wanted to take the burden off Captain Seul's shoulders.

Good thinking, right?

(Neuroscientific Investigation Team)

What?

What is it?

Oh, my. You're very handsome.

Hello, handsome neuroscientist.

At the award ceremony, I didn't even see you leave.

You left very quickly.

I didn't want to stay there.

Captain Seul as known as Ms. Surrogate Drinker. Hello.

We'll see each other often from now on.

Why is that?

Oh, I guess you don't know.

These days, water system field coordinators...

disinfect the filters and check the machine regularly.

We're supposed to do it once a month.

But since my ex-husband works here,

you get special treatment. I'll visit seven days a week!

What? So you'll come here every day? What's this about? Forget it.

Hey, water system field coordinator. If you're done, please leave.

I must do another check to make sure it works.

It works fine. I checked and made sure. Get going already.

- Enjoy the clean water... - Go.

- Wait, I'll call you tomorrow. - You need to leave.

- Hey, I'm doing my job! - Goodness. Have you lost your mind?

This is my place of work.

So what if it is?

Can't your ex-wife install your water purifier?

- Is it against the law? - It is.

It's absolutely illegal, so leave.

- Go. - Honey.

- Honey. - Get going.

- Honey, let's hurry home. - What are you doing?

We're going to watch an adult movie.

Come on.

- Keep your eyes ahead. - Let's go home.

- Unbelievable. - Come on, let's...

Chief Kim, couldn't you have discussed this with me?

What's wrong? She gave us the friends and family discount,

and it's cheaper than ordering bottles.

That's not what I mean.

She's not even my wife. She's my ex-wife.

Imagine how it would be for me to see her at work.

Right, I guess it would be uncomfortable.

That's an understatement!

Should I tell you the neuroscientific way...

to resolve the awkwardness?

- Does such a thing exist? - Of course.

Dr. Brain, you genius. What can I do?

Get your brain to think that she doesn't make you uncomfortable.

Have a good day.

Get my brain to think she doesn't make things awkward?

What does he mean by that?

You should have your brain think that...

she doesn't make you uncomfortable.

You know,

anyone could've told you that,

but he makes it sound insightful.

You should work on it.

Maybe I should.

I don't find my ex-wife uncomfortable.

I don't find her uncomfortable.

- She makes me uncomfortable. - What?

No, I should try harder.

I don't find my ex-wife uncomfortable.

I don't find her uncomfortable.

I don't find my ex-wife uncomfortable.

I don't find her uncomfortable.

I don't find Mo Ran uncomfortable.

I don't find my ex-wife uncomfortable.

- What's wrong? - I want to get going.

When we're already here?

I'm tired, that's all.

I'm just not in the mood today.

- Let's talk inside. - Why should I go inside?

Why not?

- We... - Honey!

Honey?

Why you...

Detective Geum, please hold back.

No, let me go.

I knew you'd come.

- Unbelievable. - That's him.

Congratulations, Myung Se, darling.

Come on, get off me.

What do you say?

How about a trip down memory lane?

Go, lady. Leave.

I don't find my ex-wife uncomfortable.

I don't find Mo Ran uncomfortable.

I don't...

My ex-wife...

Darn, she makes me uncomfortable!

The more I say it, the more I think about her.

The image of her keeps floating inside my head.

Dr. Brain...

Help me!

Okay, here's an empty space.

What the...

Are you kidding me?

Dr. Brain, didn't you see I was getting ready to park here?

I spotted a car dawdling that didn't have its blinkers on.

Shouldn't detectives be better drivers?

Why did I stop him from leaving? I should've let him go his way.

I must've been insane.

Look here, Dr. Brain. This is bad.

Why are you making a fuss over a parking space?

No, I'm talking about something that is really bad.

I can't stop thinking about my ex-wife.

I tried my best not to think about her, but I couldn't,

and it's been haunting me. What's going on?

It's only natural.

Our brains...

aren't familiar with the concept of denial.

It's why you can't tell them to stop doing something.

If you tell someone not to think about elephants,

that person will keep picturing elephants.

Exactly, and it's killing me!

Hold on a second.

Did you tell me that knowing what it'd do to me?

Yes, exactly.

To mess with me?

You finally caught on.

It's a commonly known fact in neuroscience,

but you didn't know.

Your lack of knowledge had you suffering.

Why that little...

Was I being played by him all night?

Unbelievable.

Darn him.

Forensics came back with the analysis...

on the next-door neighbor's phone.

A strange photo was found.

A strange photo?

That phone was on the next-door neighbor's phone?

They were obviously having a fling.

A fling like teenagers?

This is adultery.

Everyone seems to be gifted.

I'm jealous of...

I meant that it disgusts me.

Whether it's a fling or adultery,

this is the motive for Heo Bum Soo.

It could also be Kim Jae Sook's motive.

She killed him to keep her affair a secret.

Ms. Kim seemed overwhelmed with guilt.

It could be for killing the man or for having the affair.

Cheating on your spouse doesn't make you a killer.

Gosh.

Our clever Dr. Brain. Just like you toyed with me,

isn't there a neuroscientific way...

to find out who the killer is?

There is.

There's a neuroscientific way to figure out...

why Ms. Kim is guilty.

We have clear evidence...

that points to your husband's motive.

(Evidence Bag)

You're wrong. It wasn't like that between us.

While my husband had an affair with Cherri,

I got close to my neighbor out of spite. That's all.

Who knew my husband's affair was the result of an illness?

Right.

We understand the level of betrayal you must've felt.

Why you cheated on your husband isn't important here.

What matters is that we have proof of your husband's crime.

Your husband will be indicted for the murder of Lee Chang Yong.

How many years in prison will he be sentenced to?

At least 35 years.

Did you say 35 years?

No way.

That's absurd.

My husband isn't a brutal killer.

Self-defense.

That's right. It was self-defense.

There is no evidence...

that points to a struggle between the two men,

and the victim didn't fight back.

Mr. Lee was killed due to being struck in the head...

from behind.

It can't be self-defense.

Your spasms seem severe.

I take it that extreme stress is causing them.

Why don't I tell you how to remedy that condition?

What's important...

is that you don't think about...

what happened that day.

But I can't stop thinking about it.

You should try harder.

Try hard not to think about the incident.

Let's not think about it.

Let's not think about it.

(Second Place)

No.

Don't think about it.

I can't think about it.

Darn it!

Did you call me?

I did not!

No.

I'm glad you showed up.

It's all your fault.

Cherri, you...

You won my husband over, and that's why I did it.

Now he's in trouble because of you.

It's all your fault!

I don't understand.

Can you say that again?

I don't understand.

Can you say that again?

I don't understand.

Can you say that again?

This is a waste of time. We're just wasting our time.

Shall we wager?

Yes. The winner gets a wish.

That's so old-fashioned.

How about betting 10,000 dollars?

I'm experiencing so many things...

for the first time because of you.

I've never made such a terrifying and horrible bet.

I'm reducing the chances you'll get dementia.

Our brain craves new experiences.

Any topic leads to the brain with you.

Hey.

Look.

She's looking around?

This smells fishy.

It smells like the destruction of evidence.

If we collect the evidence she left out...

That will bring the case to an end.

Darn it.

It should be on silent.

I forgot.

Is she coming?

Is she?

The driver was in the car all along?

They could've left sooner.

That was embarrassing. I feel my ears turn red.

You always cramp my style.

Detective?

Do you...

suspect me?

Oh, no.

We were just looking around.

Yes, that's it.

We came to see if we'd overlooked anything.

Dr. Brain...

Dr. Shin dropped something.

That's why we were crouching.

You must've wondered if we were playing a game.

Ms. Kim?

How are the symptoms?

I did as you said,

but they got worse.

I couldn't stand it anymore,

so I left for a walk...

while bringing out the recyclables...

and dropping off the dry cleaning.

It won't go away overnight.

You must keep trying.

Go on your way.

Okay. Bye, then.

Bye.

Goodbye.

Gosh, my poor back.

It'll take ages to go through all this.

This is nothing.

In the movies, they go through a mountain of trash.

Can you quit commenting and help out?

Commenting is what a consultant does.

I'll rest in the car.

Find the weapon.

You'd better.

Is there anything I can beat him with?

No, I'd prefer something sharp.

Hang on.

Yes, something like this.

Wait.

This is...

I guess you found it.

Crucial evidence.

You're right.

I found it just when I was thinking I'd love to beat you to death.

I want to wave it around.

It must be murderous.

It's the murder weapon.

Is this the real murder weapon?

From this trophy,

anything to make it the murder weapon,

like blood, tissue, or DNA,

was not found at all.

Other than Ms. Kim's prints, it was completely clean.

Very clean.

You talked about it being murderous.

You got ahead of yourself.

You're the one who got excited,

calling it crucial evidence and what not.

Not again.

She threw out this trophy...

because seeing it tormented her.

She'd smashed the speakers.

I think she flew into a rage whenever she heard Cherri's voice.

Ms. Kim's state suggests she's under great duress.

The NFS sent over the trace analysis report.

They found a fiber underneath the victim's fingernail.

This is it.

- Bye, then. - Bye.

Oh, I get it.

What Ms. Kim left with that day.

The day you saw us outside,

you left this at the dry cleaner's.

Though it looks like you brought it with you...

to throw away but not to have it washed.

Either way, I picked it up...

and tested it with luminol and found blood.

In a straight line like this.

We compared the DNA,

and it was Lee Chang Yong's.

It got on me when I was standing next to him.

Why didn't you hand this in when we collected the evidence?

Gosh.

I feel weird.

I think this arm went numb.

Do you need medical help?

Just a moment. Ms. Kim?

How about...

I do this?

What was that about?

You evaded the pen.

Your arm isn't numb.

I really can't move.

Exactly.

You feel like you're paralyzed.

I think it's a conversion disorder.

Sudden trauma,

psychological conflict, or duress...

can cause such symptoms.

You feel numb,

or your motor skills feel inhibited.

If it gets worse, it could trigger a seizure too.

It's different from the common paralysis and convulsions...

because the symptoms go away once your anxiety disappears.

In other words,

the only remedy that can cure you...

is the truth.

Tell us the truth about that day.

It wasn't me.

As you can see, I'm not well.

I should get going.

Then we'll hand your husband over, and the prosecutors will indict him.

Are you okay with him being sent to the detention center?

Are you okay? Let me help you up.

No.

I can't get up.

I can't move.

You'll be able to get up once you tell us the truth.

Fine! It was me.

I hit him with the trophy.

I killed him.

I killed him.

I ran into my neighbor on my way home from my workout...

at dawn.

You see, I had made a mistake.

I had been avoiding him ever since then.

I didn't attend the club meetings either.

Naturally, we started talking about my husband.

What a bizarre disorder.

You must've been very upset.

What's even weirder is that...

you have to have strong feelings for someone...

In other words, you have to love that person very much...

for you to mistake them for someone else.

For Cherri or an alien, for example.

Then if you develop that condition,

you could think I'm an alien.

Right?

We had fun last time.

Back then, I thought my husband was cheating on me.

That happened on the spur of the moment.

It doesn't matter how it happened. You two cheated on each other.

Whether it was caused by an illness or confusion.

What are you doing?

My husband will hear us.

Come on.

Honey.

What are you two doing?

Honey, it's...

What is going on?

Goodness. You heard everything. Why ask?

Fine, forget it.

You cheated on her with Cherri too.

So...

just call it even, okay?

Call it even.

He followed him into his place, and they started fighting.

Hey!

Darn it.

Old habits die hard. You hit on my wife, didn't you?

All the neighbors know that you're a philanderer.

Look who's talking. Didn't you cheat on her too?

You cheated on her with Cherri.

- Don't act all innocent. - What can I do for you?

That is not called cheating!

I was ill.

As if.

- Oh, boy. - You piece of...

Gosh, what's your problem? You little...

- What can I do for you? - Shall I teach you a lesson?

You see,

this world is full of easy women like your wife.

I can't believe you fell for a virtual human.

What? Cherri?

- What can I do for you? - You fell in love with Cherri?

- Oh, there she is. Your girlfriend. - What can I do for you?

My goodness. You are...

the biggest loser I've ever seen.

He was ill. Don't you dare talk to my husband in that manner!

Why you...

Honey, what do we do?

What should we do?

I think...

he's dead.

What are you doing?

I did this.

Honey.

Listen carefully.

I did this.

It was all me!

Okay?

What are you talking about?

When we got married,

I promised to protect you for the rest of my life.

I will protect you.

My husband...

turned himself in to take the fall for me.

I was the one who hit him with the trophy.

I killed him.

You can feel it too, right?

Your symptoms are going away now that you've told us the truth.

Detective.

Please...

let my husband go at once.

Yes, okay.

I'm okay.

Why did you do that?

I said I'd protect you.

I told myself I should stay strong and stick to the story.

But the more I told myself that, the harder it got.

My body refused it.

I feel much better now.

Since I came here, my spasms have completely gone away,

and I can sleep comfortably at night.

I'm sorry.

I developed such a bizarre disorder...

and gave you the wrong idea.

I ruined everything.

No. Thanks to your condition,

I realized...

that we never saw eye to eye...

although we truly care for each other.

Why was it...

so hard to say this?

I'm sorry.

For...

making you lonely.

It's such a mystery.

How did Heo Bum Soo pass the polygraph test?

Because his brain believed that it was true.

If your brain completely deceives you...

into believing that you killed someone,

the polygraph could say it's true.

He loves her so much that he managed to completely fool his brain.

Even though they were in a sexless marriage for years.

To me, you are more of a mystery.

He's someone who is beneath you...

intellectually, financially, physically,

and in every other way.

On top of that, he has a brat of a daughter...

in middle school.

But your love system activated for him.

Was it that obvious?

You make it seem obvious.

Only a fool wouldn't know.

Why hasn't Detective Geum caught on though?

Because he's a fool.

He's a fool.

How do I approach this fool, then?

People like him...

must hear it in words.

I should confess my feelings?

That's right.

By the way, I can share a neuroscientific way...

that will increase your odds.

How much will it cost me?

Since it's my last day here,

this one will be on the house.

I feel terrible when I think about Mr. Heo.

I get why he did it.

Who knew you were such a romantic?

Could you also take the fall for your cheating spouse?

That's not what I meant.

I get why he fell in love with a virtual person.

I see.

Even without that weird syndrome,

I might be able to fall in love with her as well.

You can hear her voice even from the rice cooker.

I was scooping rice one day when she told me...

to enjoy the food.

(Neuroscientific Investigation Team)

I almost burst into tears.

Only Cherri speaks to me with that much warmth.

In Japan,

there are men who marry virtual people like her.

Is that so?

Why don't I start obsessing over Cherri, then?

I urge you to hold back,

or your wife might bash your head in.

Shall we?

Hold on.

What were you two secretly discussing?

Something that you will greatly appreciate.

Dr. Shin, the consultant for...

the Neuroscientific Investigation Team.

We set up a press conference...

at which you will speak on behalf of the team.

- I refuse. - Sorry?

But why?

You love to seem superior.

How many times must I tell you...

that I don't seem superior? I just am.

And like I said,

now that the case has been wrapped up,

I will get going.

But...

Don't just stand there and get him to stay.

Why is it always me who has to beg and be clingy?

Dr. Brain!

Dr. Brain, come on.

If there's anything you need, just tell me.

I'll pay for it out of my own pocket.

(Keep Quiet)

There is something I want.

What is it? Just tell me.

I'll take out a loan in dollars to get you what you want.

I want you to leave.

Hold on. Let me say this again.

This is my place of work.

If anyone should leave, it should be you.

It's why I'm leaving. So what's the issue?

You're a weird one.

But that's not what I meant.

Are you really leaving us?

But we grew close while working together.

How about a drink?

If not, how about a meal?

Beef. It'll be on me.

He's just leaving without even considering my offer.

He's going to turn around.

He's going to turn around.

Turn around.

Turn around.

(Keep Quiet)

I can't believe he didn't glance back in my direction.

Could I have grown attached to him?

Why am I sad to see him leave?

Your last case?

But why?

Why not consult on more cases?

You're the one who said it was weird.

That was because you preached revenge,

which wasn't like you at all.

You seemed to be immersed in solving cases these days,

so why did you quit?

I guess you're right.

I wouldn't have come across someone with Capgras syndrome...

had I been cooped up at the research center.

That reminds me. How did the case unravel?

The wife was the killer.

Her husband Heo Bum Soo, who was the patient,

took the fall for his wife.

I see.

Mr. Heo must love his wife dearly.

Not you too.

Why is everyone going on about love?

Love...

is only an electric signal exchanged between neurons.

People let those signals take over and fall head over heels for others.

Then comes betrayal, hatred, and suffering.

But after all that, they repeat the journey with someone new.

How pathetic is that?

Ha Ru.

Do you know when those electric signals...

shine the brightest?

You're asking that with an answer in mind.

Exactly. It's when people are in love.

Like you said, loving someone ends painfully in a lot of cases.

However,

the brain will forever remember...

how our neurons twinkled for someone else.

And I believe...

that those memories keep us going in life.

Ha Ru,

there's only one thing I wish for you.

I want you to feel that blissful moment...

once in your life.

It's love.

Love has you in pain.

How did you know that?

There's no need to be surprised.

It only took minor observation skills.

You're no longer wearing your ring.

My superiors ordered me not to speak to you.

Was it your girlfriend or your wife?

My girlfriend.

Then it's all good.

You'd be in trouble if it was your wife.

Because you'd have to lose something that belongs to you.

You might have to fight the urge to beat her up.

However,

girlfriends are expendable.

Love...

is like a program utilized by our brains...

that was designed to help pass on our DNA.

Another expendable girlfriend will appear...

who'll serve as a medium for you.

So don't be too heartbroken.

Sure.

Those foolish...

make a huge fuss as though love...

is the world's most beautiful concept.

But that isn't the case.

Love is the root of all evil.

Just think about it.

Think of all the crimes that are committed out of love.

The love for a deity leads to religious wars.

Parental love leads to suicide...

after murdering their innocent child.

Some manically murder their ex-boyfriend or ex-girlfriend...

because they can't get over them.

You hear of that often on the news.

They killed...

because they were deeply in love.

Whether it was driven by possessiveness or jealousy,

love was at the heart of it.

I also knew someone who was like that.

Someone who killed...

in the name of love.

I want to forget,

but I can't.

The memories have been creeping up on me lately.

I'm sorry.

I'm sorry.

Yi Na. Daughter?

Yi Na?

My daughter,

you'll be late at this rate.

Seriously? I messed it up because of you.

- Where? - Right here.

My eyebrows don't match!

You ruined them.

Nothing's ruined. They're the same.

They look exactly the same, so come and eat.

- I'm late. - You said you'd eat.

I said I was late. Bye.

If you skip classes, I'll dock your allowance!

Yes, of course. See you.

She said goodbye, though.

She said she'd eat.

She said she'd eat.

It's too much work.

It's harder than catching killers.

Jeez...

Dr. Brain.

I wonder if he eats at all.

He's such a jerk.

He never called once since he quit.

No.

It's stupid of me to even expect him to call.

Shall I call him?

No. Why bother a busy man?

No.

Won't he like it if I ask how he's doing?

Yes.

Hello, Captain Seul.

Come on out. I'm outside.

In hiking attire?

Yes. If you don't have any, come out as is.

I'll buy you a whole new outfit.

No, I have hiking clothes.

Why do you suddenly want to go hiking?

You have five minutes. Be quick.

Hello? Captain Seul?

What was that about?

Why are we going hiking?

Five minutes? Shoot.

Darn it.

Oh, no. Mister!

Wait for me.

Mister!

Wait.

Mister!

Darn it.

I'll get penalty points if I'm late today.

I can't breathe. I shouldn't have run.

Geum Yi Na.

Why are you grinning when we're late?

Thanks to being late, I get to ride the best kind of bus.

The bus you're on.

What kind of pick-up line is that?

It's corny, and I hate it.

- What do you do after school? - I have extra classes.

Shall we watch a movie instead?

The model student would do that?

Yes or no?

I can't go.

My dad said he'd call to check on me.

What will you watch?

- Anything's fine. - I can't be bothered.

Hey.

Guys.

Look at her grin.

Who's the loser next to her?

Oh, my gosh.

Why do you suddenly...

want me to watch my health?

Why do you suddenly want to start hiking?

Look at the view!

I have a plan.

What?

What's the secret to...

a successful confession?

Your chances improve if you confess somewhere high and dangerous...

when out of breath.

High up, dangerous, out of breath.

All things that increase your heartbeat.

That's right.

Our brain...

constantly monitors our body.

If our heart races, it tries to identify the cause.

If you were to confess then,

he'd think, "My heart's racing because I like her."

I have something to say.

You have something to say? Go ahead.

I need to sit down.

I can't breathe, and my heart's pounding.

- No, you can't. - What?

I must say it at the peak.

We're almost there, so let's run the last leg.

- What? - Come on. Let's run.

I really wish you'd just say it here.

Come on. Run.

What do you want to say at the peak?

You're still young.

When you get married, you'll understand how I feel.

The eyes show if you've been in love.

It's not the case for you.

I want you to feel that blissful moment...

once in your life.

Love?

Hey.

My gosh.

Here.

Thank you.

I feel much better.

I have something to tell you.

Go ahead.

Shall we turn on the love system Dr. Brain mentioned?

You and I should give love a try.

What?

Detective Geum!

(Brain Works)

The suspect is addicted to playing games.

A home-bound recluse left home after five years...

and committed murder?

After a certain time, he asks the same thing over and over.

We call him Mr. Reset.

Stop.

The assailant's memory is reset every 30 minutes,

so he shouldn't have any memory of the murder.

How did he call it in?

We found the witness in the footage.

It's definitely a lie.

Why is he lying?