The big racket is a 1976 police film directed by Enzo G. Castellari.
Plot: State Police Marshal Nicola Palmieri, with the help of his trusted Sergeant Salvatore Velasci, investigates in the city of Rome on a mafia organization that exercises its control in the city by perpetuating the racket of extortion against business owners in the capital.
The organization is led by Rudy the Marseillais, who heads a group of ferocious and vengeful mafiosi. Palmieri's violent methods of investigation, however, are not accepted by the police leaders and, when he is removed from office, following the death of Velasci during a firefight in an attempt to foil a robbery at the Tiburtina station, he decides to organize an armed retaliation, in which a group of victims of the Marseillais gang decide to participate.
