After wife and mother Kate Miller discusses her sexual frustrations with her psychiatrist, she goes to meet her husband at a museum. At the museum, she meets a strange man who she follows to a cab and then has sex with him at his apartment. After the affair, Kate is brutally murdered in the elevator by a blonde woman with a razor. A blonde prostitute named Liz caught a brief glimpse of the killer, but when she comes forward with this information, she becomes the prime suspect to the police and the next victim to the murderer. Liz teams up with Kate's son Peter to find the real killer.