The wife and mistress of a cruel school master collaborate in a carefully planned and executed scheme to murder him. The plan goes well until the body, which has been strategically dumped, disappears. The psychological strain starts to weigh on the two women when a retired police investigator begins looking into the man’s disappearance on a whim.

In this classic of French suspense, the cruel and abusive headmaster of a boarding school, Michel Delassalle, becomes the target of a murder plot hatched by an unlikely duo — his meek wife and the mistress he brazenly flaunts. The women, brought together by their mutual hatred for the man, pull off the crime but become increasingly unhinged by a series of odd occurrences after Delassalle’s corpse mysteriously disappears.