Jason Kemp (Christopher Reeve) is a quadriplegic who passes the time spying on his neighbors from his window. By chance he catches one of them, Julian Thorpe (Ritchie Coster), beating his wife and reports it to the police. He later becomes certain that Julian has killed her, but fails to convince his nurse or his friends of any foul play. Meanwhile, Julian has discovered that Jason is privy to his crime, and is conniving to take care of him as well.