The statements of a mafioso accuse Commissioner Giovanna Scalise, but the agents of the tenth Tuscolano are convinced that the mafia wants to take revenge on her by trying to discredit her and they try to demonstrate the innocence of the commissioner. After some shadowing, Parmesan and the other agents discover that the lawyer Loiacono, instead of meeting the men of the gang directly, uses an intermediary to receive orders from the mafia.