The Milan-Rome high-speed train arrives at Termini station, passengers disperse, the platform is empty, but no one gets out of the luxury car. Police agent Colomba Caselli, familiar to the reader from the novel “Killing the Father,” discovers the bodies of people in the carriage who apparently died from suffocation. This suggests a version of a terrorist attack, which the police leadership is ready to pick up. However, Colomba suspects that the case is not at all connected with terrorists. To understand what happened, she will have to turn to her old friend Dante Torre, the only person who can see the truth behind the pile of lies. Together they establish that the attack on the train is just an episode in a long chain of mysterious murders. Behind all this lies a mysterious woman who leaves no trace. Only her name is known - Guiltine, Angel of Death, devastatingly beautiful...