The Sicilian Clan
Roger Santet is a convicted murderer sprung from prison by the Sicilian clan led by the Vittorio Manalese that is aging. They conspire to steal a cache of stones from an exhibit in Rome. Since they are preparing for that heist, the mobster's American friend Tony Nicosia implies that a way to find the stones would be to ditch the transport plane while it's en route to New York. The inspector Le Goff is using all of the tools that are available to thwart their aims. Although heist is so successful, Santet finds himself trapped with the Daughterinlaw of Manalese