Lieutenant Anton Kopaev works in the Internal Security Directorate of the Ministry of Internal Affairs and acts undercover. Nobody knows that he is a police officer. And now he receives a new secret mission: to urgently find police colonel Ivanov, who, according to available information, “in his free time from duty” heads a gangster group. Traces of a werewolf in uniform lead Anton to the lair of pimps who supply Russian girls to foreign brothels. The lieutenant gains the trust of the bandits and gets a job as a security guard, not yet noticing that he has been being followed for a long time...