Ziba McKenzie is a profiler and consultant for Scotland Yard. It creates a psychological portrait of the criminal. For her, what is important is not the fingerprints and DNA at the murder scene, but the personality, motives, projections and psychological traumas from the past that pushed a person to commit a crime. London, rush hour. A commuter train crashes—and literally falls apart. Ziba, who was traveling in it, is trying to save her neighbor in the carriage. She, dying, whispers: “He did it. You have to tell someone.”…The serial killer who has returned to the city feels a surge of inspiration. He had been waiting for this moment for 25 years. Ziba begins an investigation, not suspecting that she has a special role in the maniac's scenario...