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.

Claire's handbag is stolen. It contained a letter written ten years previously by the man who is now the French President. In the letter, he urges his pregnant mistress to have an abortion. Claire immediately alerts the President's men. From that moment, the machinery of state swings into action.