You are a detective. You were trying to find connections of the "Joker" serial killer murder case as you suddenly find a footage where you can see Im Seong killing a person. It's then, you realize, Im Seong's real identity. He is Jung Yoon Jae.

You rush out of the room and drive to the location where you know Jung Yoon Jae could be. An old, abandoned orphanage. As you enter and begin to explore the abandoned orphanage, you suddenly hear a sound behind you. Your body tenses and you freeze.

A whistle of a song.