Borsalino & Co.

Gangster impresario Roch Siffredi (Alain Delon) has pre-war Marseille in the palm of his well-manicured hand. But when an upstart Italian mob tries to cliam the French port town's vice trade for their own, the resulting gang war leaves Siffredi's partner dead, his theater, and nightclub in ruins, his brothel vacant, and his allies turned against him. Tortured, humiliated, and cast into an insane asylum, Siffredi is stripped of everything except an all-consuming vendetta against Valpone. (official distributor synopsis)