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.

To prevent being accused of the crimes, an ex-burglar must catch a thief who’s been copying his style.

In the South American jungle, supplies of nitroglycerine are needed at a remote oil field. The oil company pays four men to deliver the supplies in two trucks. A tense rivalry develops between the two sets of drivers on the rough remote roads where the slightest jolt can result in death.