A musician and a mystery woman derive a mutual thrill from spying on each other through the windows of their high-rise apartments - unaware they in turn are being watched by someone who doesn't have their best interests at heart. Thriller, starring David Soul, Pam Dawber and Rod McCary.

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.