Alyona Zemtsova, a nightclub waitress, was raped and killed. Not only the murdered woman's colleagues fall under suspicion, but also her man Denis Kuznetsov. The detectives learn that shortly before their death, a strong quarrel occurred between the lovers. However, Alena's diary, found at her home, removes all suspicions from Denis and forces the investigators to take a completely different path.

A young nanny of the Rybin family, Lina, suddenly dies. Cause of death - cocaine overdose. Cocaine was found in one of the cans of baby food bought by Maxim Rybin for his nephew. Investigators of the operational investigation department are trying to arrest Maksim Rybin at his workplace in an investment company, but Lieutenant Colonel Khromchenko from his own security service interferes with them, citing their boss, Colonel Sedykh. But Sedykh is not aware of Khromchenko's plans and demands an explanation from him. Khromchenko says that Rybin was a drug dealer: he and his wife Katya traveled constantly for work, and their routes coincided with drug trafficking routes.