Sung Jae, I told you to lift the toilet seat when you go.
Make sure you zip up your fly when you come out.
Sung Jae, great job.
You came in first again, right? Congratulations.
Mom, what about my parcel?
Oh, right. It didn't come today.
It'll be here soon.
Let's eat first.
- Can I sleep for a bit and eat? - You must be sleepy.
Sure. Why don't you just go to bed today?
- Really? - Yes.
Can I really sleep?
You're at the top of your class. Do whatever you want today.
- I'm really going to bed. - Sure.
Yes!
I'll jump onto my bed just like this.
Sung Jae, stop jumping onto your bed.
Sung Jae.
Sleep tight.
Prosecutor Eun.
Wake up.
(Episode 18)
Prosecutor Eun.
My gosh.
If I don't call you after an hour,
please come to my house.
I might be in need of a doctor.
The passcode is 1234.
What is this?
Prosecutor Eun. Prosecutor Eun.
Are you all right?
I know now.
- I know what happened to Sung Jae. - Are you crazy?
How many of those did you take?
I was reminded of my past.
We had those pills too.
Pills we took during the exam week when we fell sleepy.
My parents...
only favored my older brother.
They didn't pay any attention to me.
That's why...
I obsessed over getting good grades so they would notice me.
Now, I get it.
- How Sung Jae must've felt. - Good job.
Next time, get stabbed, fall, and do everything.
Of course, it hurts. My gosh.
Don't take pills for migraines. It will damage your liver. Here.
(Case study on synergistic action of stimulants)
What... What is this?
It's a case study about synergistic action of amphetamine...
and visible and auditory hallucinations from the side effect.
Then can we prove that he hallucinated?
We found the empty bottle in the garden.
The leftover powder was amphetamine.
Did you have to take the pills to identify what they were?
That's weird.
My head hurts, but...
What's wrong with me?
It's because dopamine and noradrenaline hiked in your body.
(Noradrenaline excites the sympathetic nerve system.)
When you feel good, just sleep it off. Sleeping is the best.
What did you say?
What are you talking about?
What...
Is it because you're twisted?
Seeing you sideways is slightly better.
You know that Jin Dol is...
the only one who likes you, right?
Wait. Hold on a second, Dr. Psycho.
- What? - Let me ask you a question. Okay?
- What is it? - Let's be honest here.
Do you really think I'm a joke?
I know that you really hate me,
patronize me,
and look down on me. I know all of that.
So what?
At times, you're such a selfish jerk.
But at times, you can be so humane.
I can't figure you out.
Did you really kill a person?
- No, I didn't. - It wasn't an intentional accident?
- I don't know about that. - Why don't you?
I don't remember.
I remember before and after the accident, but not the accident.
Fool.
You forgot the most important part. My gosh.
Yes, I forgot the most important part.
By the way, why are you...
answering all of my questions honestly? Why?
You're known to be sharp-tongued.
When the drugs wear off, you won't remember this conversation.
Go to sleep.
What?
What did you... You're writing a novel.
- Hey, get out. Get out. - Goodness.
He put something on the door...
(Read the case study about amphetamine and its side effects.)
(If you need more information, consult the NFS.)
Are you ready to order?
Yes. Stella, do you want to get the rib eye?
When it comes to marbling, rib eye is the best.
Give us 150g of the sirloin from the lower part,
130g of each flank and flat iron,
and 100g of each outside round steak and the tri-tip.
Okay.
There are different kinds of sirloin.
The lower sirloin is from number 10 to 13 of the backbone.
That part is the best grilled.
Wow. Fantastic. You're absolutely perfect.
It's nothing.
- All right. - Should we try the tri-tip first?
Tri-tip? Sure. Tri-tip...
- Let me. That's not it. - What?
I know that.
No, you don't. It's hidden here. Here's tri-tip.
Tri-tip.
It's time.
Great.
Try it.
Excellent.
It's cooked.
Okay.
Have some.
None for me, I guess.
Perfect.
Stella, don't you remember the fixed amount?
We had that the other night. 2 to 8 and 7.2 percent alcohol.
Soju, 9.8cc.
Beer, 3.2cc.
Alcohol proof, 7.25
That's the perfect point.
You got me fascinated.
That's the formula.
Go. Next round.
Then I'll mix one this time.
No.
One more shot, please.
I can do this easily without measuring it.
It's easy. Do it like this.
Good.
- Cheers? - Cheers.
I told you that you had nothing to worry about.
Your son must get into a good school to do great things.
There should be no stumbling blocks.
Yes, sure. Please send my regards to him too.
Let's meet up soon.
Yes. Goodbye.
(Seoul Eastern District Prosecutor's Office)
(Murder charges are not pressed.)
(National Forensic Service)
Amphetaminic stimulant?
Narcotics?
Who on earth fed this to my kid?
Honey.
It's me.
I bought it for him.
It was supposed to help him stay up.
What have you done to our child?
They said it would help with his studies.
Sung Jae liked it because it helped him focus too.
What have I done?
No, what have I done?
Have you gone insane?
What about you?
All you've done was brag about how he's the top of his class.
You haven't done a thing.
Did you ever care about how hard he had to work...
to live up to your expectations?
What am I going to do?
Goodness.
Here.
That drug...
is banned in Korea.
Please tell us...
how you got them.
What am I going to do?
In order to prevent other kids from being victimized,
we need...
your help.
Set up your password.
Choose your payment option.
Your locker is opened. You may put in your articles.
(Aram Station, locker number 13)
(Number 27, 956777)
Your locker is open.
You may take your articles.
(Would you like to open your locker now?)
What is this?
Hi.
Darn it.
You're under an emergency arrest for violating the Narcotics Law.
You!
Darn you.
Darn it.
Let go of me!
Stay still.
(Beloved son, Ma Sung Jae, takes his root down for another life.)
How did you know?
That's his favorite.
I saw that...
in Sung Jae's...
school locker.
I'm sorry for everything.
And thank you.
I hope...
you two will be better soon.
Sung Jae did nothing wrong.
He just had whatever I gave him.
It's all my fault.
Sung Jae was such a good kid.
Don't be so hard on yourself.
(Letter of Resignation)
When you pull yourself together, come back.
I'll be waiting.
I'm sorry.
All I ever said to him was to be a good student.
I never told him...
that I loved him...
or that I was so proud of him.
I never said that to him until the day he died.
I had...
I had no idea I'd regret it so much.
Sung Jae.
I'm sorry.
I am sorry that I couldn't protect you.
Sung Jae.
Dad's so sorry.
It's me.
I just thought...
we could eat together,
Dad.
Have some.
And try this one too.
- Okay. - Eat up.
- Do you like it? - Yes.
Family...
Seo Hyun.
- Hello. - Mommy.
Hey, Seo Hyun.
There's my girl. How was your day?
- Family can be the most selfless. - Give Mommy a kiss.
- Dad. - Yes?
Can you step away a little?
Some might think that you've lured a minor.
Right?
And at the same time, they can be the most selfish.
Dad.
Goodness, look who this is.
Beom, it's been so long.
Have you eaten?
Yet,
they are those whom you can never abandon.
(Partners for Justice)
(Hesitation Marks: Left during a suicide)
They're 10 years old. They were hard to find.
Yes, I think that will do.
See you then. Bye.
How've you been?
Is Mom well?
Why are you here?
I'm getting married.
- So what? - I wanted to tell you first.
You said you'd work for charity your whole life.
You said you think more of strangers than your own family.
Don't talk about Mom now. You disgust me.
- Hyun. - She still...
cries herself to sleep, thinking of you.
Don't show up in front of us again.
I shouldn't have left you like that.
Let's meet up with Mom one day.
You'll become an uncle soon.
Wait, wait.
Guess what?
You changed my life.
Look. My lifeline is longer.
This is what they call a handmade line on the palm.
- Look. - Don't drive so roughly.
Do you think you're a race car driver?
- Hello. - Hi, how are you?
We have a body of a middle-aged male.
A neighbor called, but he didn't pick up,
so security went to check and found his body.
Any ID?
We just got here. We'll check when we get upstairs.
Okay. Oh, wait, wait.
How is Lieutenant Cha? Is he okay?
He's off for the rest of the week.
Our chief told him to take a break.
I see. Thanks.
Hello.
- Welcome. - You came yourself?
I'm filling in for Dr. Ma.
Let's all go upstairs then.
Let's see.
What's that? Come over here.
Seoul Eastern District...
Just a moment. We need to check something first.
What's the problem?
You can see the body later.
What's the matter?
The thing is...
What thing is what? Get out of our way.
- Can't you just... - Let go of me.
Why...
It's...
It's... It's Mr. Seo.
Prosecutor Kang. Prosecutor Kang!
- Move! - Not yet. The scene's not clear.
- I said, move! - Wait a bit. They're almost done.
No, I have to see him. I have to check.
Wait, Hyun. Calm down.
My investigator's in there! Jeong Min's in there!
- I said, move! - Please don't.
Move! Jeong Min!
Jeong Min, it's not you, right? Jeong Min! Jeong...
Jeong Min!
Prosecutor Kang.
Other than the head injury...
and the injection mark, we found no external traumas.
We'll know more once we do an autopsy.
- An autopsy? - No signs of struggle...
or forced entry through the windows or door.
Was he alone?
He could've known the attacker.
You're right.
I think he was with someone. Look.
There's only one smashed glass,
but two are missing.
There's a security camera in the parking lot.
- Could we find out who... - The camera's a fake.
It's just a model of a camera.
I was hoping to find something.
(Sodium pentothal)
Succinylcholine?
Sodium pentothal?
Cause of death. Injection of sodium pentothal and succinylcholine...
which caused respiratory organ failure.
Is an ordinary person capable of injecting these drugs?
Injecting into the vein is tough...
unless you're a medical professional.
You could cause death by injecting these drugs into muscles,
but then death would be very slow and painful.
We can't be sure about anything yet.
We'll consider every possibility...
and get to the truth with scrutiny and thorough investigation.
Get me Mr. Seo's call history from yesterday immediately.
His call history going back three months and social media details.
Please go through everything.
Yes, sir.
The dashboard cams in parked cars might have caught something.
Check all the cars that were parked there yesterday and today.
Yes, sir.
Go over all the cases that Mr. Seo was investigating.
We must check if anything happened to make someone...
want to kill him.
Okay, I'll do that.
What a mess.
Everything we do tends to upset people.
I have Mr. Seo's call history from yesterday.
Current time is 09:10. We'll begin the autopsy.
You can't come in here. There's a viewing room...
You cannot continue Seo Jeong Min's autopsy.
- What? - As of this moment...
until his autopsy is complete,
all NFS personnel are banned from the autopsy room and viewing room.
Please leave.
(Search and Seizure Warrant)
(Judge Choi Bong Kyu)
- Based on what grounds? - Destruction of evidence.
You can't perform the autopsy...
since you killed him.
The last person Mr. Seo called...
was you!
(Call History)
(Partners for Justice)
Mr. Baek Beom, you're under arrest...
for the murder of Seo Jeong Min as of now.
This is too hard, Hyun.
Baek Beom doesn't have an alibi, and we have definite proof.
What are you talking about? Who killed whom?
I brought everything upon myself, Dad.
It's not a house that belongs to someone with normal mentality.
It's the same drug that killed Mr. Seo.
We found the decisive evidence.
You lost your mind when you saw this photo.
You decided to kill him because you were scared that...
we might find out about your crime 10 years ago.
Fine. I did it. Are you happy now?