Investigator Darya Loginova has earned the well-deserved respect of her colleagues for her professionalism, intelligence, and personal courage. But even she reaches a dead end when an elusive serial killer appears in their quiet town. The mysterious maniac targets a particular type of young woman—slender brunettes under 25—whom he holds captive, stuffs with rum-filled chocolates, and then strangles a few days later. The psychopathic kidnapper wears a harlequin mask. A task force has been assigned to find him, but Darya lacks an experienced and perceptive profiler. She finds an unexpected partner in psychiatrist Andrey Ignatov, who was himself convicted of murdering an influential businessman. And only recently, he came face to face with the deadly «Harlequin»…