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...

Sasà Jovine (Nino Manfredi) is a self-styled lawyer involved in petty businesses with Neapolitan mobsters (camorristi). When one of his clients, don Michele Miletti (Paolo Stoppa) offers him a huge bribe (mazzetta) to search for his daughter who disappeared mysteriously taking with her some hot documents, Sasà finds himself trapped into a spiral of homicides.

A psychiatrist is murdered and a rich heiress fears her disturbed lover will be implicated as the killer. She hires an ex-lover lawyer friend to help her defend him but when he turns up dead, the lawyer realizes he´s in over his head.