When darkness covers the city, a maniac emerges from the darkness and cold-bloodedly crushes everyone in his path. Not a drop of pity, not the slightest clue. However, for the cunning police captain Dmitry Ovsov, even the lack of evidence is not an obstacle. Easily, with a certain amount of grace, never repeating his methods of investigation, Ovsov calmly and firmly follows the path of solving numerous murders. The police captain's logic is impeccable and precise. He not only finds the killer, but also brings to light a deeply secret drug mafia gang. The first book in the series of detective stories about Dmitry Ovsov is written in simple, understandable language, the story is full of funny situations, scenes of the triumph of the method of deduction and is based on an intricate plot in the style of Agatha Christie. All this allows us to count on the widest circle of readers.