Soon the magistrate, investigating the water supply of the city and the construction of a large dam, discovers dangerous collusions between the mafia, politics and law enforcement, in the persons of the M.P.

The decision to close the wells that supply the city causes a scandal to which De Francesco decides to take shelter, giving the men of the escort powers and prerogatives that effectively deprive the staff of the Prosecutor's Office, of which the ambiguous Polizzi seems the probable mole.

After initial disagreements between Angelo and Andrea, an increasingly intense friendship arises between the men in the escort, in the midst of a daily odyssey made up of exhausting telephone checks, risky car journeys, threats.

The pursuit of the investigation also leads to the killing, by the Cosa Nostra, of Bonura, now gripped by overwhelming evidence, despite the silence of a colleague and friend of De Francesco, judge Barresi of Caltanissetta.

Worthless is the anger of the escort men who, now in tune with the magistrate, decide, despite everything, to stay by his side, including Fabio who would even give up the long waited transfer.