Between eleven o’clock and midnight one evening, a notorious trafficker Jérôme Vidauban is shot whilst walking in a tunnel in Paris. The case is assigned to Inspector Carrel, who is Vidauban’s perfect double. Using his resemblance to the arch criminal, Carrel manages to infiltrate in Vidauban’s circle of acquaintances and contacts. He becomes embroiled in a bizarre web of intrigue and discovers no shortage of possible murder suspects, all of whom appear to be surprised to see him still alive.

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!"