Flash

After the party, the birthday boy wakes up from the doorbell and goes to open it. Along the way, he gradually remembers what happened yesterday. Behind the door, he sees two boys in police suits. Being scared, he steps back, and notices that a girl is lying on the floor, next to her is a knife in a pool of blood. The boy loses consciousness from shock. He see a dream that those policemen take him out of the apartment, that's why he wakes up.