Nikita Ivashov, a junior police lieutenant, still serves as a detective commander under Tsar Gorokh. And here’s a new case, while investigating which he must not lose the authority of a great opera. So, the drawings of a flying ship were stolen from King Pea from a secret chest. All the threads of the investigation are being torn by a skillful and cruel hand. The boyars gloat and form alternative search and capture commissions. Nikita and his employees - expert Baba Yaga and kind but dull assistant Mitka - will have to carry out difficult and dangerous search activities to find the thieves of the drawings and defend the honor of the police uniform.