A musician living in an apartment building likes to check out the residents of the building opposite him--until he finds out one day that an attractive woman in that building is checking him out. He strikes up a relationship with her. Soon afterwards a string of serial killings occurs in the neighborhood, and suspicion begins to fall on the musician.
He watches her. She watches him. An exciting game. A seductive game. Until they see something they shouldn't... and the game turns to terror!