Undercover High School (언더커버 하이스쿨)

Delete your entry record and get out of there!

We're leaving.

Agent Jeong?

Are you not done yet?

Goodness.

Are you all right?

Yes. Let's go.

The "do" key made no sound?

Why that one key?

Isn't it just old and broken?

Think of the keywords, you idiot.

"The key that moves silently."

That means it's not broken. The key itself is a clue.

Right?

Hey. What's up with you?

What?

Did something happen in the chairwoman's office?

No. I guess I'm just tired.

I'll get out here.

- Yeong Hun. - Okay.

- Take care. - Bye.

What's up with him?

He's acting weird.

Drive on.

Clean up quickly so we can go home.

- Ms. Kim. - Yes?

Don't pretend to be weak.

Don't you want to go home?

- I do. - Hurry up and clean up.

So what if you feel bad about it?

Watch where you're going.

You just ruined my night.

- I apologize. - Don't mind them.

- Finish cleaning up. - I'll wipe them...

- and return them to you. - Come on.

Do you know how much these cost?

Shall I call the police?

Kneel and apologize before I sue for damages.

Stay on your feet.

Stand up.

What are you doing?

He's much older than you.

Apologize for humiliating him.

I don't believe this.

- Do you think you're special? - Han Seung Jae.

You wipe my shoes for me, then.

Why are people beneath me lecturing me?

Han Seung Jae.

How dare you talk like that to a teacher?

But my shoes...

That's enough.

I'm so sorry.

Let me apologize instead.

I'm sorry to say this,

but I believe he deserves the apology.

And it should come from your son, not you, sir.

Ms. Oh.

You can't talk like that to Seung Jae's father.

I'm sorry, sir.

I'll scold Ms. Oh very harshly in private.

Please don't be angry.

Yes. Don't go too far.

Why cause a scene on a day like this?

Your car's waiting outside.

We'll walk you out. Mr. Lee?

- Let's go. - Okay.

Did you give up becoming a full-time teacher?

How many times did I tell you to leave the council members alone?

He was way too rude.

- Are you all right? - Yes.

Thank you for stepping in.

I found this.

It fell out of the student's pocket.

- Thank you. - Sure.

- What's that? - I don't know.

We strive to attain the truth

And act wisely and sensibly

That's the third done.

Now just the fourth is left.

The tip-off that the foundation's trying to smuggle out the gold.

Was the source confirmed?

I'll ask the director if the tip-off is reliable.

You focus on what's before you,

the stories and the gold.

Sir?

- Sir. - What?

We're here.

Oh, right.

Thanks.

- Goodbye. - Goodbye.

What's up with him now?

He's feeling down because Hae Seong's feeling down.

They're family.

Let's go.

Mi Jeong.

Since you mentioned family.

How about we...

I'm seeing someone.

Drive.

I'll drive, then.

The piano.

A key moves but doesn't make a sound.

It's beyond me.

Let's just prepare for class.

"There are currently no records of the notes,"

"only the lyrics."

Only the lyrics remain.

The lyrics?

The school song lyrics.

"We strive to..."

From here...

The key that didn't make a sound was "do."

So...

Deul, byeong.

What the heck does this mean?

The dead girl played the piano.

The do notes the girl played?

"When the one with the bead faces the red sun,"

"the gold will shine."

"The gold."

I got it!

I need...

He ignored my call and here he is.

Hey.

Just a moment.

Agent Jeong. I deserve some praise.

I solved the third scary story.

Here you go.

It was all in the keywords.

"The key that moves silently."

"The dead girl performance."

The "do" key you pressed didn't make a sound.

I checked the syllables for that note that I played...

Thank you. Good job.

What's with that reaction?

A student shouldn't smoke.

Is something wrong?

Ever since we left the chairwoman's office...

Nothing's wrong.

Why the heck is he...

Hey!

Show some appreciation for those who care.

Come with me. Let's have a drink.

It was Seo Myeong Ju...

who put me on this mission.

She wanted to find the gold,

and she used me to do so.

I was a pawn in a game she'd set up.

She has someone within the NIS.

There's no one I can trust.

I'm not sure if this will console you.

I don't want you to think you're alone.

Suspecting every person around you...

That's too painful.

Once you find the one person you can't trust,

the others will all be on your side.

And...

there's me too.

Here.

You can drink.

Cheers.

Who do you think is suspicious or odd?

It'll be one of the people who knows about this operation.

Don't worry. I'll help you find them.

You have to be in school all day every day.

Starting within the NIS would be too daunting.

Why not spy on the chairwoman?

Tracking her movement, tailing her,

pulling phone records.