Behind every gun is "The Sicilian Clan!"

An ambitious mobster plans an elaborate diamond heist while seducing the daughter-in-law of a ruthless mob patriarch as a determined police commissioner closes in on all of them.

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Main Cast: Jean Gabin, Alain Delon, Lino Ventura, Irina Demick, Amedeo Nazzari, Philippe Baronnet, Karen Blanguernon, Elisa Cegani, Jacques Duby, Yves Lefebvre

Director: Henri Verneuil

Writers: Henri Verneuil, José Giovanni, Pierre Pelegri

Editor: Pierre Gillette

Cinematographer: Henri Decaë

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