A psychiatrist poses as an ex-sorority sister to stop a slasher freed by a computer error.

Cash Bentley and his wife Louise lead an average upper-middle-class life in suburbia, with a nice home and two fine children. But Cash grows increasingly unsettled in his life, yearning for the glories of his athletic youth and watching them fade further in the distance with accumulating age. Louise worries about him as his difficulties with mid-life pull him further away from happiness and comfort with his family.

A young actress has retired from films to marry the son of a prominent and rich politician in New York City. The father objects strongly to the marriage. The actress is being blackmailed by a second-rate artist who has stolen some letters from her that could be misconstrued. During the payoff, she is knocked unconscious, and awakens to find herself involved in a murder and the police have her marked as the number-one suspect.