Based largely on real people and actual events, Fernando Di Leo's action-packed film - the final part in his Milieu Trilogy - is his boldest commentary on corruption and the criminal underworld. A bomb attack in a cinema in Palermo kills all the members of one mafia family except for Cocchi. Realizing that the instigator of the bomb attack is Daniello from another mafia family, Cocchi is determined to get revenge. Lanzetta, a hired killer employed by Daniello is told to assassinate the rival family. Following Lanzetta's successful hit he finds himself in the midst of the ensuing gangland war, with Daniello attepmting to turn him into the police, his boss' daughter kidnapped, and the rival gang looking for revenge.