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The young wife of a former mafia boss, Yana Monatska, is found murdered in her apartment near the police station. The woman is lying naked in the middle of the room, with a child playing by her side. "An ambulance, called by a neighbour, finds that the victim was killed by a prick in the ear. The killer undressed the woman and bathed the child. And then disappeared. The police chief, Colonel Nagornyak, together with the detective department, begins an investigation. Captain Chornyi notices that the new murder may be connected to the death of the mafia man himself, who was stabbed in the chest with a file and put in a box outside a shop. Investigators discover that a new series of murders has begun in the city. The murders are ritualistic, furnished with symbols and have a hidden meaning.