The cruel and abusive headmaster of a boarding school, Michel Delassalle, is murdered by an unlikely duo -- his meek wife and the mistress he brazenly flaunts. The women become increasingly unhinged by a series of odd occurrences after Delassalle's corpse mysteriously disappears.
Les Diaboliques is a 1955 French psychological horror thriller film co-written and directed by Henri-Georges Clouzot, starring Simone Signoret, Véra Clouzot, Paul Meurisse and Charles Vanel. It is based on the 1952 novel She Who Was No More by Pierre Boileau and Thomas Narcejac.