An engineer and a no-global protester lose their lives in a deadly ambush. Ramaglia, who rushed to the scene, is suspected of shooting the protester, sparking urgent investigations to establish his responsibility. The Squadra investigates the involvement of the engineer and the possible instigators, with the Camorra as the main suspect. The discovery of an architect's body mysteriously links the victims. Francesco settles in Piazzetta Viviani, while Anna seeks justice for her sister's death.