1947, in France, Antoine and Antoinette, a young couple living in Paris, lead a monotonous existence: he works in a print shop while she is a shop assistant. But one evening, they regain hope: Antoine finds a winning lottery ticket in his girlfriend's handbag. He decides to cash it in, but loses his wallet. What follows is a series of twists and turns that redefine the couple's priorities while forcing them to remain optimistic.

Roger Pigaut
as Antoine Moulin

Claire Mafféi
as Antoinette Moulin

Noël Roquevert
as M. Roland, le patron de l'épicerie

Gaston Modot
as Le caissier de la loterie « Les Geules cassées »

Louis de Funès
as Émile, le garçon épicier et un invité à la noce

Brigitte Auber
as Une invitée au mariage

Made Siamé
as La patronne du Tabac

Charles Camus
as Le patron du Tabac

Charles Vissières
as L'habitué du Tabac

Jean-Marc Tennberg
as Un client du Tabac