Original subtitles

(Train)

(This drama is fictitious and names, places, organizations, incidents,)

(entities and jobs are unrelated to real life.)

(Some scientists believe the universe expands infinitely,)

(so there are worlds identical to ours out there.)

(They also believe that passages connect those worlds.)

(Mukyeong Station)

(Mukyeong Station)

Seo Kyung.

- Inspector Han! - Get him!

Stop!

Seo Kyung. Seo Kyung.

Seo Kyung.

(Train)

(Episode 4)

Suspect apprehended. Returning to station.

This is definitely not a dream or a hallucination.

Same date, same city.

But everything is slightly different from before.

Mukyeong Station.

The church.

You're under arrest for killing Lee Jin Sung!

A live person is dead.

He died of cancer three years ago.

- A dead person... - Do you not feel well?

is alive. And...

(Ilsung Police Station)

"Han Seo Kyung".

(Inspector, Han Seo Kyung)

"Inspector"?

Do you...

not know me?

Do you think...

anyone in Korea doesn't know you, Senior Inspector?

"Senior Inspector"?

I trust you won't take your time to admit the charges.

Drug broker Lee Jin Sung is dead.

Motive, circumstances, physical evidence,

everything points to you, Senior Inspector.

I murdered Lee Jin Sung?

You were under inspection right before Lee Jin Sung died.

For taking drugs.

Lee Jin Sung was your supplier.

You met three years ago...

when you were in the Drug Investigation Unit.

In return for supplying you with drugs,

you always managed to get him off.

So, because Lee Jin Sung reported me to Internal Affairs,

you're saying that I killed him?

The day before he was murdered, didn't you meet with him...

around 8pm?

There's a witness who saw you and Lee Jin Sung at Ilsung Station.

No.

And that night,

you went to Lee Jin Sung's house.

You probably wanted...

to silence him forever before getting investigated.

Only you can tell me if you weren't yourself because you were high.

According to the ballistics report, the gun that was used to kill him...

was a 38-caliber revolver.

It's the gun you had in possession only a while ago.

I'm not the only cop who carries that gun.

We detected your fingerprints...

on the doorbell at Lee Jin Sung's house.

And...

There's me.

In this world, there's another me.

This footage was recorded...

in front of Lee Jin Sung's house after he was killed.

You admit all of your charges, right?

That...

isn't me.

The man you see in front of you...

didn't kill Lee Jin Sung.

I'll keep interrogating you until you admit the charges.

Where should I begin?

From the top?

The motive is off.

I don't have any motive to kill Lee Jin Sung.

I have never done drugs.

Other than the report the Internal Affairs received,

is there proof that I did drugs?

The surest way to confirm that would be checking my body.

I will consent to any tests you ask for.

I have never done drugs.

Fine.

Let's talk again once the results come out.

And one more thing.

It's about the evidence you mentioned earlier.

I don't know who killed Lee Jin Sung with the gun.

But I can swear to you that wasn't my gun.

You can compare the bullet from Lee Jin Sung's body with mine.

And you'll see that I'm right.

What did it say?

He tested negative for drugs.

What about the ballistics report?

That too. It wasn't from his gun.

Darn it. This is driving me crazy.

Then, why did he go off the grid until we put out an APB on him?

My friend works at Mukyeong Police Station with him.

He often gets cooped up at a place and disappears for days.

- It's a regular thing for him. - But doing what?

They said it all made sense after hearing that he's a drug user.

Hey, dimwit. But he tested negative for drugs.

Darn it.

Seo Kyung.

Seo Kyung.

Even if you catch the culprit...

Even if you kill that culprit,

Seo Kyung will never come back.

Was it a dream?

You said Lee Jin Sung was your informant.

I searched his computer, his house, and his car.

But we didn't find the ledger you talked about.

- That's... - There are two possibilities.

The culprit who killed Lee Jin Sung took the file.

Or everything was a lie from the beginning.

I don't know how you managed to skate by on those tests.

But don't lower your guard just yet.

I still...

believe you belong...

in prison.

If you know that I'm innocent,

why are you so hostile against me?

I'm ashamed...

that someone like you is a fellow police officer.

Mr. Seo.

You are still a prime suspect.

You cannot skip town like before.

That won't happen.

I will never...

leave this place.

Even if I am framed as a murderer,

suspect myself of going crazy every moment here,

and have no idea the kind of world I'll face outside,

I will do whatever it takes to stay here.

Inspector Han.

(No signal, Outside of cellular network coverage area)

I don't care where I am.

It doesn't matter even if I'm dreaming or going insane.

Seo Kyung is here.

I must...

find out who I am in this world.

Did you look into...

Senior Inspector Seo's records of leaving Korea?

He didn't leave the country at all.

Bring me the files...

about his eyewitness accounts after Lee Jin Sung died.

I must investigate his whereabouts once again.

Why is that woman so obsessed with Senior Inspector Seo?

Seo Kyung.

He definitely said my name.

He's a National Police University graduate.

We're different.

You were under inspection right before Lee Jin Sung died.

For taking drugs.

Did my other self...

really kill Lee Jin Sung?

Where could he have disappeared to?

(Director of Detective Division: Oh Mi Sook)

(Serious Crime Team 3, Team leader: Seo Do Won)

We have the same job, and we work at the same place.

But why did we end up living such different lives?

I should look into his surroundings.

(Mukyeong Police Station)

(Mukyeong Police Station)

(Strict execution of the law, Trustworthy police)

(We will always do our best for our citizens.)

Hey, shouldn't you eat with him?

- Why? - He's your team leader.

He never eats with anyone else.

- But still, you should join him. - No, I prefer it here.

- Thank you. - Thanks.

I called and asked someone at Ilsung Police Station,

and he was apparently released last night.

After what happened,

he still came back and ate with a straight face?

He's a crazy jerk. A worthless piece of trash.

Hey, watch what you say.

He cleared his name.

Come on. You know what I mean.

I don't know how he managed to get out of this one.

But everyone here knows that he's a piece of trash.

Before he came here, he got suspended...

for letting bars off the hook in return for money. You know that.

He was on drugs and was corrupt?

I'm ashamed that someone like you is a fellow police officer.

Anyway, Mr. Seo wasn't the guy who murdered Lee Jin Sung, right?

My gosh, come on. I wouldn't have been surprised...

even if he turned out to be the culprit.

It probably runs in the family.

How can a murderer's son be a proper cop?

What's that supposed to mean?

- Who's a murderer? - I told you to watch it!

My goodness.

Well, 10 years ago, someone got murdered in this town.

And the culprit turned out to be Mr. Seo's father.

Let's be honest. It was a horrible death.

He not only strangled the victim to death,

but he even cracked his skull.

His dad was a terrible person.

He can't be any better than his dad.

Detective Woo.

(Serious Crime Team 3)

(Mukyeong Residential Murder)

(Mukyeong Residential Murder)

(Mukyeong Residential Murder, 2008)

(Mukyeong Residential Murder)

(Attached data)

The murder that happened 12 years ago...

also took place in this world.

("The Culprit Frequently Got Drunk and Used Violence")

("Mukyeong Residential Murder", Only a necklace was found...)

But in this world,

the case didn't get covered up.

The real culprit never got caught.

So my dad ended up getting falsely accused for it.

("Mukyeong Residential Murder", Only a necklace was found.)

(Where are the rest of the jewelry?)

(Resignation Letter)

- What's this? - They won't let me move teams...

or assign me to a new position.

As you already know,

it's because Joon Young and I are the only ones left on the team.

So you'd rather quit your job...

than to work for a guy like me?

Please accept my resignation.

Is it because I'm a murderer's son?

That doesn't matter to me.

No child gets to choose his or her parents.

But you're able to choose...

how to live your current life.

Do you also think I killed Lee Jin Sung?

I heard you already got investigated at Ilsung Police Station.

I'm asking if you think I'm capable of killing someone.

You've known me for a while now.

I'm sure you know this.

But we're all capable of committing murder.

The difference is that some choose to hold their anger...

and some just can't.

(Resignation Letter)

Sir.

If you think someone isn't worthy of being a detective,

I bet you're right.

I trust your opinion 100 percent.

Even if you think that way about me.

But...

can you give me some time?

If it really turns out that I crossed the line...

If I really did kill Lee Jin Sung...

Then I'll willingly quit before you do.

If I really killed someone,

I'd have no right to go around arresting people.

After all, I'm a cop.

Let me ask you something.

Is there someone called Lee Jung Min...

on the Forensics team of Gyeonggi Police Station?

My gosh.

You startled me.

Are you with Forensics?

I'm Han Seo Kyung from Ilsung Police Station.

Hi. Just a moment.

- Come in. - Okay.

Sorry. I don't have a business card.

I'm Lee Jung Min from Forensics.

Inspector Lee Jung Min?

Do you know me?

You spoke with Senior Inspector Seo...

the day Lee Jin Sung died.

I meet about 10 detectives a day...

and speak to them on the phone about 20 times a day.

That's what I do each day.

What's wrong with speaking to an officer?

People from your station asked, and I answered already.

You two aren't just colleagues, are you?

Right.

I didn't say that much,

but Do Won and I are friends.

We grew up in the same neighborhood.

If we're friends,

is it a huge deal that we talked over the phone?

You were friends.

Now you're his ex-girlfriend.

I heard you broke up...

a few years ago when Mr. Seo was involved in various corruption.

There was no record of you calling each other recently.

That means you did what you could to avoid each other at work.

But then, the day Lee Jin Sung died,

he called his ex-girlfriend.

What do you think was going through...

Mr. Seo's mind that day?

You already worked and cleared the scene,

so why are you back here?

Because this is how you do things.

Instead of digging into Do Won,

did you check other leads?

Lee Jin Sung's enemies? His finances?

His family? Lover?

Drugs weren't delivered in person, so there's nothing there.

He had no enemies or financial problems.

His family is in Canada.

He has no girlfriend, so that's not a motive.

As if it's not.

We found strands of hair on Lee Jin Sung's bed last time.

They were from an unknown woman.

His family is not here, so it doesn't belong to a relative.

Was it really him who reported...

Do Won to Internal Affairs?

Knowing well that it could lead back to him?

If you have the time to look into my past with Do Won,

you should go back and check Lee Jin Sung's too.

- Let's pack up and leave. - Okay.

Jung Min.

Seo Do Won.

Jung Min, I'll go ahead.

Okay.

Will you please say...

we're still friends?

You lunatic!

Gosh. I can't believe I'm so pleased to hear that word.

I need your help, Jung Min.

You're the only person here who can help me.

You went to Lee Jin Sung's house.

You probably wanted...

to silence him forever before getting investigated.

Explain.

Explain what happened.

I don't know.

I don't know, Jung Min.

If I broke the law more times than I ate,

and stooped low enough to take drugs,

could I have killed someone too?

Me?

Will you pull yourself together?

Seo Do Won. Get a grip.

You didn't kill Lee Jin Sung.

That's what you told me.

You'd rather die yourself than kill someone.

That's impossible.

You suffered so much over what happened to your dad.

Think about how you made it this far.

What do you mean? What did I say?

You called me the day Lee Jin Sung died.

(Seo Do Won)

- Hello? - It's me.

What a short greeting considering you haven't called in years.

Things got too darn bad.

What should I do?

It wasn't me.

Lee Jung Min.

You know me.

I didn't kill him.

It wasn't me.

What does that mean?

Where are you?

Seo Do Won. Do Won!

I want to beat you up for living the lifestyle you chose,

and I have so many curse words I want to say, but not about that.

Because you told me you didn't do it.

Do you know whose this is?

Lee Jin Sung...

definitely had a woman in his life,

but I can't find anything on her.

I found a woman's hair on the bed,

but there were no phone records...

and no girlfriend came to the funeral.

Isn't something off?

Did Lee Jin Sung say anything?

- Park Min Kyung. - What?

We found strands of hair on Lee Jin Sung's bed last time.

They were from an unknown woman.

(Public telephone)

It's a payphone?

At Lee Jin Sung's time of death.

This is the last number that called.

Excuse me.

So you're from the police?

What is this about?

I don't know. I don't recognize him.

Are you sure...

you have never heard of the name Lee Jin Sung?

This is my first time hearing it.

Then,

is this not yours, Ms. Park?

To me, it just looks like a common hairpin.

Is there a reason that made you think this belonged to me?

- Honey. - What's going on?

Who is he?

He's a police officer.

A police officer? What does he want from you?

- You weren't scared, right? - No, I'm okay.

What's this about?

I came to ask her a few questions about an incident from this area.

Thank you for your time.

Park Min Kyung and Lee Jin Sung...

didn't cross paths in this world?

Show me the footage before 1am.

She was the last person Lee Jin Sung talked to on the phone.

Detective Lee, can you run a license plate number for me?

10S 0846.

What did the cop say?

Was there an incident in our neighborhood?

I don't know what happened in detail.

I guess it's nothing serious.

What is it? Let me see.

Are you all right? Wait here.

- Honey, I'll go to a pharmacy. - No.

I can go.

Getting some fresh air sounds nice after all this smell of food.

Will you be okay?

I didn't think our conversation was over.

Are you sure you're carrying your husband's baby?

What are you implying?

Do cops have the right to accuse people?

I told you I don't know him. I don't know him!

What about this?

Will you make sure he gets a lower sentence?

Do you not know what's inside this?

I think I know.

Lee Jin Sung's drug sales ledger.

Even in this world, you were the only one he could trust.

What are you doing here?

This lady, Park Min Kyung, and Lee Jin Sung were lovers.

She might know something about the culprit.

Ms. Park, on the day of Lee Jin Sung's death,

you were the last person he talked to.

The time of your call with him was very close to the time of death.

What did you talk about with Lee Jin Sung?

My husband doesn't know anything.

Can you keep it a secret from him and close this case quietly? Please.

What's wrong?

Ms. Park.

What is it?

Ms. Park.

- Ms. Park. - Ms. Park.

I called your husband.

I didn't tell him about your relationship with Lee Jin Sung.

I only told him that you were safe at the hospital.

He's on his way now.

This is my husband's baby.

That's why I was going to end things...

with Jin Sung.

Min Kyung, please don't do this.

I shouldn't have started this to begin with.

Can you please reconsider? Reconsider just this once.

- Please. - Let's break up.

No. I can't let you go like this.

I'll go to your husband.

And I'll tell him all about our affair.

Jin Sung.

Don't hang up. Wait.

What? Who are you?

Hello?

Jin Sung.

Jin Sung!

Are you sure? You heard them bump into the wall?

(Emergency Medical Center)

Inspector Han.

Did you hear Park Min Kyung's voice on the phone?

Is that why you went to threaten the witness?

And a pregnant lady at that?

I went to her because I wanted to prove...

that I didn't kill Lee Jin Sung.

- I wanted to prove it to you. - Why is that?

Because I don't like the way you look at me.

That's too bad.

I think I found a way to lock you up.

You were thorough enough...

to switch guns and get rid of your footprints.

But there's one thing you missed.

Keep this in mind. If something happens to Ms. Park,

I will consider you to be the culprit.

How did you know that this hairpin...

belonged to me?

Lee Jin Sung gave you that, didn't he?

If I hadn't called him...

to break up with him that night,

he would've been sleeping at that hour.

Then he wouldn't have heard the doorbell.

And he wouldn't have opened the door.

Then do you think...

he wouldn't have died like that?

Or do you think...

none of this would've happened...

if I didn't break up with him get married?

"I wish my dad..."

"didn't die that day."

"I wish he stayed alive and paid for what he did."

Don't expect me to pity you.

Up until pretty recently,

I also asked myself the same kind of questions...

dozens of times over and over again.

So I'm not the guy who can tell you that it's not your fault...

and that you should forget about everything...

and focus on the baby.

You can choose to feel guilty or not.

It's up to you.

What did you choose to do?

I always felt like I was indebted to you.

I always felt so guilty. And I always...

wanted to break free from that.

So just leave me alone.

I chose...

to feel guilty for the longest time.

I'm never going to make the same mistake again.

You asked me what happened the day he died, right?

That night,

he told me something strange.

Are you sure?

You heard them bump into the wall?

(Ilsung Station)

Thank you.

There's a witness who saw you and Lee Jin Sung at Ilsung Station.

Believe in Jesus.

Thank you.

Believe in Jesus.

Please. Give it a read.

(Mukyeong Church)

(Mr. Seo Do Won)

It wasn't me.

Why would I report you to Internal Affairs?

I'm here to get the product.

Ilsung Station.

That night,

he told me he saw a dead body at Ilsung Station.

(Lockers)

Is this guy crazy?

I can't believe he left this out in the open.

Are you okay?

There's... There's a dead body.

That night when Seo Kyung died,

my other self who lives here met Lee Jin Sung at Ilsung Station.

Lee Jin Sung saw the bag...

that had the sixth victim's corpse inside.

And my other self...

was actually after that bag.

And he got on the train...

hoping to catch the bag.

Seo Kyung...

and Lee Jin Sung...

both died because they saw the corpse that was inside the bag.

Then it's him.

The culprit is here.

(National Forensic Service)

Did you find a way to put me in jail?

(Bloodstain Analysis Report)

(The bloodstain showed a woman's DNA.)

(We did not detect anyone else's DNA.)

The bloodstain was from Lee Jin Sung's house.

I thought it might be the culprit's, but I was wrong.

As you can see.

I didn't kill Lee Jin Sung.

Inspector Han.

I'm going to catch this guy myself.

I'm going to catch him no matter what.

How did you know that Lee Jin Sung and Park Min Kyung...

were seeing each other?

Has it ever crossed your mind...

that perhaps, somewhere else, we all live a different life...

with different relationships...

in another world?

A world where Park Min Kyung chooses Lee Jin Sung...

instead of marrying her husband.

And we might not have had to meet like this...

I don't know what you're saying,

but I'm sure of one thing.

Wherever and however we met,

we wouldn't be on good terms.

Right now, everything is all messed up.

But...

My name is Seo Do Won.

Let's start over from there.

No.

This can't be our beginning.

The Mukyeong Residential Murder Case that occurred 12 years ago.

You're the murderer's son, and I'm the victim's daughter.

That was our beginning.

Senior Inspector Seo Do Won, the son of Seo Jae Chul.

You knew...

who my father was?

Inspector Han, are you sure you gave me the right information?

I almost got...

I almost got into big trouble because of you.

I'm sorry.

I thought it was solid information.

There was a witness who saw Mr. Seo shooting up.

Then why do the test results say he's perfectly clean?

What's this?

Jin Sung asked me to keep it safe for him.

Mr. Seo asked me to give this to you.

I'll be off now.

Ms. Park.

If you want to keep it a secret,

take it to the grave.

Don't talk about you and Lee Jin Sung.

I'm surprised.

I didn't expect you to say that.

There's nothing in the world that's right for everyone.

There are only my standards of right and wrong.

You must live,

whatever it takes.

Lee Jin Sung's ledger?

We hit the jackpot.

They're serious VIPs.

Politicians and businessmen.

Senior Inspector Seo told the truth then.

This is huge. It's no joke.

Hi. Can you do me a favor?

Look into a transfer for me.

To Mukyeong Police Station.

Who are you?

Do Won.

It's not a dream or a hallucination.

But everything is slightly different from before.

Do Won.

A live person is dead.

A dead person...

is alive.

(Train)

The me from this world was on the train that day.

We are in each other's world.

Wasn't there an accident?

An accident? What accident?

What happened 12 years ago?

A killer's son and a victim's daughter.

You said that's how we began.

I'll prove to you that you're wrong.

So, Do Won, do you have evidence to prove your point?

There really is a world in which all this began.