Synopsis
Cast & Director

A small parcel is delivered to a police station. Inside is a human heart and a
music box engraved with the initials PM. Four police officers, Song Miran,
Yang Saeyoung, Pyon Jaehyok, and Yang Jinwoo are in charge of the case.
As the police investigate the case, a second murder happens. One day,
Song Miran finds the body of the murderer dubbed the "Piano man" who has
already been killed by Pyon Jaehyok, her colleague. She doesn't feel that it
is right. Then she receives a telephone call from the murderer who threatens
that if she doesn't capture him within 12 hours another victim's heart will be
sent to her.