International title: Syndicate Sadists
Umberto Lenzi
Milan. A biker named Rambo, an ex-gangster-turned-vigilante, rides into town to visit an old friend, Pino Scalia, who now works for a security squad scrutinizing local Mafia activity. The Conti gang kidnaps the son of a wealthy engineer, Marco Marsili. Scalia, who had exposed the kidnapping, is killed by one of Conti's men, Duval. Rambo intervenes to avenge his dead friend and release the kidnapped boy. First he dispatches Duval, then, by using the two billion ransom as bait, he puts old Paternò's gang against Conti's, so that the two factions almost exterminate one another. Even though he is alone against the ruthless survivors, Rambo kills the remaining bandits and sets the boy free. Old Paternò, isolated and humiliated, commits suicide, and Rambo leaves on his bike towards new adventures.