A teenager is involved in running from the police in his hot rod hits a car in a hit-and-run case where the victims turn out to be his mother and his best friend in another hot rod.

A bleak mansion sits ominously on a cliff above the sea somewhere on Florida's east coast. In its shadows, two people meet: a scientist haunted by incurable illness and a beautiful woman haunted by the voice of her dead husband.

Christabel Caine has the face of angel and the heart of a swamp rat. She'll step on anyone to get what she wants, including her own family. A master of manipulation, she covertly breaks off the engagement of her trusting cousin, Donna, to her fabulously wealthy beau, Curtis Carey. Once married to Curtis herself, Christabel continues her affair with novelist Nick Bradley, who knows she's evil, but loves her anyway.