Jean Servais, Carl Möhner, Robert Manuel, Robert Hossein, Marcel Lupovici, Dominique Maurin, Magali Noël
After five years in prison, Tony le Stéphanois meets his dearest friends Jo and the Italian Mario Ferrati and they invite Tony to steal a couple of jewels from the show-window of the famous jewelry Mappin & Webb Ltd, but he declines. Tony finds his former girlfriend Mado, who became the lover of the gangster owner of the night-club L' Âge d' Or Louis Grutter, and he humiliates her, beating on her back for being unfaithful. Then he calls Jo and Mario and proposes a burglary of the safe of the jewelry. They invite the Italian specialist in safes and elegant wolf Cesar to join their team and they plot a perfect heist. They are successful in their plan, but the Don Juan Cesar makes things go wrong when he gives a valuable ring to his mistress.