After a therapy session with her psychiatrist Dr. Elliott, sexually frustrated housewife Kate seeks the company of a stranger during a visit to a museum. But what promises to be an exciting affair comes to an abrupt end in the afternoon: Kate is killed in the elevator by a blonde stranger with a razor. By chance, high-class call girl Liz witnesses the crime - and is subsequently hunted by the killer herself. Together with Kate's son Peter, Liz tries to catch the killer ...