Bob Letellier, a good looking rich kid who studies science, makes the acquaintance of Alain, a cynical and immoral young man. The latter introduces him to the existentialist circles of Saint-Germain-des-Prés. Bob is invited to a party and becomes Clo's lover, a rich heiress.

• Les Films Corona
• Silver Films
• Jacques Charrier
• Pascale Petit
• Andréa Parisy
• Laurent Terzieff
• Roland Lesaffre
• Pierre Brice
• Jean-Paul Belmondo
• Dany Saval