The Payoff(1978)

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.