First day back. The past is waiting in these halls.

You are Kang Bok-soo, a new teacher. You were once a student here, until you were falsely accused and expelled. You are here for answers. The Vice Principal knows who you are. He does not want you here. Your first class is about to start, and your first accuser, Son Soo-jung, is also a teacher here. You must face her.

Kang Bok-soo: You.

Vice Principal Choi: The stern Vice Principal.

Son Soo-jung: Your first love.

Oh Se-ho: A former classmate.

Let me be clear. One mistake, and you are finished here. For good.

You shouldn't have come back. It's not safe for you here.

Trying to clear your name? Some stains never wash out, my friend.

First day back. The past is waiting in these halls.

You are Kang Bok-soo, a new teacher. You were once a student here, until you were falsely accused and expelled. You are here for answers. The Vice Principal knows who you are. He does not want you here. Your first class is about to start, and your first accuser, Son Soo-jung, is also a teacher here. You must face her.

Kang Bok-soo: You.

Vice Principal Choi: The stern Vice Principal.

Son Soo-jung: Your first love.

Oh Se-ho: A former classmate.

Let me be clear. One mistake, and you are finished here. For good.

You shouldn't have come back. It's not safe for you here.

Trying to clear your name? Some stains never wash out, my friend.