A police inspector is called to Milan to investigate a murder case since he grew up in the same ghetto as the suspect.

Bruno Marangoni, former center-forward of Rome, has fallen into disgrace due to a series of injuries, and now lives with gimmicks and small scams. At the height of despair he decides to commit suicide but is saved by the parish priest of a village, so he decides to move to the rectory

Now an agent of Interpol undercover, the former Inspector Giraldi, goes to New York to find his friend Salvatore Esposito, aspiring restaurateur in Little Italy, suffocated by debts with the usurers headed by Don Gerolamo. He will remove the gang and assure her of justice, but she will suffer the advances of the Boss’s daughter, the ugly Maria Sole.