In Paris in the early 1960s, Ronald is a son of a good family, with a carefree, pleasure-oriented life. He is one of the leading figures in the small world of Saint-Germain-des-Prés. Following a trivial parking incident, he meets Arthur, a young man with a straight face who hurts his pride. It is at this moment that Ambroisine, a beautiful young woman, appears... she will be the instrument of Ronald's revenge.

Jean-Claude Brialy
as Ronald

Bernadette Lafont
as Ambroisine

Stéphane Audran
as Xavière, la danseuse

Sacha Briquet
as Henri, le fiancé

Jean Tissier
as Le président

Laura Carli
as Tante Suzanne

Jean Galland
as l' Oncle Arthur

Sophie Grimaldi
as La fiancée

Serge Bento
as Bernard 1, le livreur

Pierre Vernier
as Bernard 2