At a party in his house, gangster Mario Navini kills Pia Vallachio and, helped by his younger brother Bruno, disposes of her body in a quarry. They are observed by sole witness Maria Pullerno, who flees in terror. The Italian Minister of Justice, Vittorio Guardi, asks Mannering to obtain a witness statement from Pullerno, as a result of which the Baron and Maria end up besieged by the Navinis in the police station in the village of Santa Montena.
—don @ minifie-1