The eccentric Comtesse de Saint-Plâs sells a black Citroën DS to car dealer Paul Souflé. He sells it to the young mathematics teacher Jacques Denzac who is about to marry.

Jean-Claude Brialy
The gigolo

Francis Blanche
Paul Souflé

Claude Brasseur
Trucker

Jacques Charrier
The married man

Darry Cowl
Polytechnician

Edwige Feuillère
Countess of Saint-Plâs

Jacqueline Maillan
Maria Ramirez

Jean-Pierre Marielle
Landrut

Marie-José Nat
Béatrice

Jean Poiret
Grégoire

Michel Serrault
Hutin

Jean Richard

Jean-Louis Trintignant
Jacques Danzac

Marie-France Boyer
Jacques' wife

Pierre Doris