Lyokha is a former police officer. In the midst of his drinking bout, he learns about his sister Katya's fatal illness. She does not want her daughter to be sent to an orphanage after death, and asks Lyokha to take charge so that he becomes the guardian of the eight-year-old girl. Lyokha does everything to help her sister: she brings up old connections and gets a job at the police station. The area turns out to be difficult. The criminals that Lyokha must catch are fairy-tale characters: the Serpent Gorynych, Baba Yaga and other evil spirits. And if the former sniper has no problems catching villains, then trying to become a good guardian becomes a real test for Lyokha.