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.
| Actor | Role |
|---|---|
 Jean-Claude BrialyRonald | Ronald |
 Bernadette LafontAmbroisine | Ambroisine |
 Stéphane AudranXavière, la danseuse | Xavière, la danseuse |
 Sacha BriquetHenri, le fiancé | Henri, le fiancé |
 Jean TissierLe président | Le président |
 Laura CarliTante Suzanne | Tante Suzanne |
 Jean Gallandl' Oncle Arthur | l' Oncle Arthur |
 Sophie GrimaldiLa fiancée | La fiancée |
 Serge BentoBernard 1, le livreur | Bernard 1, le livreur |
 Pierre VernierBernard 2 | Bernard 2 |
| CCorrado GuarducciLe peintre | Le peintre |
 Jeanne PérezLa veuve Goupil | La veuve Goupil |
 Stella DassasLa Duchesse | La Duchesse |
 Charles BelmontArthur | Arthur |
 Dominique ZardiUn consommateur | Un consommateur |