Terry, a young architect, had an affair with the boss's wife, Sylvia. One day when the two were flirting at Terry's house, Sylvia saw a woman Denise raped from the back window of Terry's house, but the man failed and fled. In order not to expose the affair, Sylvia is not willing to report the case, while Terry is regarded by the police as the main suspect. Soon his girlfriend Sylvia was killed. Terry teamed up with Denise and they were determined to try to catch the killer.