Barny, although a Marxist, is intrigued by the mysteries of religion. In confession, she teases a priest, Léon Morin, but he is a young and intelligent man and ready to discuss anything.

A composer and a French film star, both of whom are married to others, meet and fall in love while shooting a film in the United States.

Pierrot escapes his boring society and travels from Paris to the Mediterranean Sea with Marianne, a girl chased by hit-men from Algeria. They lead an unorthodox life, always on the run.