In a repressive boarding school with rigid rules of behavior, four boys decide to rebel against the director on a celebration day.

On the borders of the desert, Péhu, a rather blunt creature on the verge of death, confesses to Charles Sigouane that some time before he stole and killed for the sake of a woman named Marie. Péhu recovers against all odds and returns to France with a view to finding Marie and to retrieve a loot he has hidden somewhere.