An innocent American engineer is blackmailed by gangsters into a plot to assassinate his cousin, who is a judge in Sicily fighting the Mafia.

Chronicle of the dark maneuvers put into practice by a politician to seize an opposition newspaper. A Lebanese terrorist receives the order to kill a stockbroker, which triggers a series of blackmail and deception. A deputy commissioner and a journalist intend to shed light on all these murky matters, but the politician has no scruples and also knows how to move with extraordinary skill.