Roger Santet is a convicted murderer sprung from prison by the Sicilian clan headed by the aging Vittorio Manalese. They conspire to steal a large cache of jewels from an exhibit in Rome. As they are preparing for the heist, the mobster's American friend Tony Nicosia suggests that a better way to get the rocks would be to hijack the transport plane while it is en route to New York. The dogged inspector Le Goff is using all the available resources to thwart their plans. Though the heist itself is successful, Santet finds himself trapped by the mob because of his fling with Manalese's daughter-in-law.
Elenco: Jean Gabin , Alain Delon , Lino Ventura , Irina Demick , Amedeo Nazzari , Philippe Baronnet , Karen Blanguernon , Yves Brainville , Gérard Buhr , Elisa Cegani , Raoul Delfosse , Jacques Duby , Yves Lefebvre , Edward Meeks , Sally Nesbitt , Marc Porel , André Pousse , André Thorent , Leopoldo Trieste , Danielle Volle , Steve Eckardt , Roger Lumont , Sabine Sun , Christian de Tillière , Sydney Chaplin , Marc Arian , Alice Arno , Maurice Auzel , Michel Charrel , César Chauveau , Yvan Chiffre , Dominique Delpierre , Jean Juillard , Jack Knight , Rudy Lenoir , Jacques Léonard , Roland Malet , Jacques Marbeuf , Bernard Musson , Raymond Pierson , Claude Salez , Catherine Sola , Arch Taylor , Philippe Vallauris , Lionel Vitrant , Catherine Watteau , Bernard Woringer , Jean-Pierre Zola , Martine Capdevielle .