Palermo. Deputy Commissioner Giulia Corsi has an appointment with Alfio Spada, a member of the Serao clan who is showing signs of repentance. During the meeting, Spada begins to reveal something hot but two hitmen burst in and open fire. Giulia, wounded, is unable to save her informant. Meanwhile, in Rome, many colleagues have left the X Tuscolano. Understaffed, our men wonder why replacements haven't arrived yet. Luca meets Viola and informs her of the tragedy that occurred, showing himself to be very close to his dear childhood friend. While the search for the bodies at the site of the explosion continues, Luca must still solve a complex case. Journalist Cosimo Notari has fallen victim to a clear mafia execution.