Dick and Nicole Diver are a glamorous couple who take a villa in the South of France and surround themselves with a circle of friends, mainly Americans. Also staying at the resort are Rosemary Hoyt, a young actress, and her mother. Rosemary becomes infatuated with Dick and becomes close to Nicole. Dick toys with the idea of having an affair with Rosemary. Rosemary senses something is wrong with the couple, which is brought to light when one of the guests at a party reports having seen something strange in the bathroom. Tommy Barban, another guest, comes loyally to the defense of the Divers. The action involves various other friends, including the Norths, where a frequent occurrence is the drunken behavior of Abe North. The story becomes complicated when Jules Peterson, a black man, is murdered and ends up in Rosemary's bed, in a situation which could destroy Rosemary's career. Dick moves the blood-soaked body to cover up any implied relationship between Rosemary and Peterson...