Le Havre, France, in 1949. In a town that still shows the scars of war, several friends meet up in Albert's café. One of them, Laurent, has lost his job on the docks and his marriage to Madeleine is falling apart. He knows that his wife wants to start an affair with friend, Jean Sauviot. Jean is a lonely man who is attracted to Madeleine but doesn't want to commit himself to the wife of a friend. On the day that Madeleine tells her husband that she is seeing Jean, Laurent goes looking for Jean to find an explanation. Arriving on the docks in the evening, he attacks an American sailor who looks like Jean, but the man fights back and runs away after killing Laurent accidentally. Madeleine thinks that Laurent was killed by Jean and believes that she can start a new life with her lover. The police have other ideas...

1938, France, Paris, at the Superior Conservatory of Dramatic Art ("Conservatoire Supérieur d'Art Dramatique"). The first-year entrance exams are in full swing. Many applicants, few accepted. Isabelle (Janine Darcey) is one of the few chosen. She joins former students from the second and third years, including François (Claude Dauphin) and Cécilia (Odette Joyeux). They attend the drama class run by Professor Lambertin (Louis Jouvet). The young people, passionate and eager to become comedians, clash in tumultuous love affairs, because by dint of acting, they imagine that life is a farce. François, for example, is in love with Isabelle, who also loves him, but is pursued by Cecilia, his former mistress... "Put art in your life and life in your art!"