A cop recruits a criminal and his cohorts to help track down a violent crime lord who has kidnapped the ill daughter of a rich family.
Vincenzo 'hunchback' plans a robbery on a armored police van with his gang. Once the job is done, his gang try to kill him and absconds with the loot. Vincenzo hides in the sewers before looking up his friend Monezza who the police later interrogate for his involvement with vincenzo. Meanwhile, Vincenzo is getting revenge on his gang by killing them off one at the time in his various brutal ways.
A shoot out after a robbery ends with the death of the Chief of Police. Police detective Ghini goes in search of a suspect, Lanza, to avenge the death of his boss. Ghini's search leads him to Belli, a Sicilian gangster and 'Trashy', the dirty leader of a gang of killers. The action is violent as both police and criminals track down Belli who still finds some time to attempt a couple of robberies...
