Milano calibro 9

First part of Ferdinando Di Leo's poliziottesco crime trilogy. When small-time gangster Ugo Piazza is released from prison, he meets with former employer and psychopathic gangster Rocco. He tries to convince him, the mafia and his girlfriend he wants to go straight and clean himself from criminal activites. But everyone thinks he's lying and believe he has stolen $300,000 and hid them somewhere.