Plot: Following the arrest of the Mafia boss Paternò, responsible for the attack on the police station where Sciacca worked in Palermo, the Sant'Andrea agents work tenaciously to uncover the links between the Mafia and the Camorra. Meanwhile in Palermo, a repentant belonging to the Paternò clan claims that Sciacca is actually a corrupt policeman, who was in turn involved in the massacre