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Prison doctor Petya extracts from the Doctor the recipe for a lethal cocktail he used to eliminate his victims. In exchange, the death-row inmate is transferred to a hospital for treatment—so the Doctor will live a while longer. The prison warden spots Japanese visitors in town and offers them the chance to kill one of the condemned prisoners, with generous payment. Meanwhile, they need to deal with Kostya once and for all. The comrades' choice falls on Sasha, who had a good relationship with Volkov. Sasha hesitates to deliver the fatal injection and turns to Natasha for help. If Kostya is eliminated, the illegal business inside the prison walls can thrive without any obstacles.

The prison warden pays a visit to the prosecutor and delivers a stern, educational talk to him. Natasha returns home and finds the fur coat that Sasha bought. Katya stops by to visit her and reveals the real source of income for their husbands. The two women then go to Yulya's place and inform her about her husband's business. Natasha's mother is desperate to meet with investigator Zhuchkov to find out why her son-in-law is still free despite being suspected of two murders. Masha helps Nina sneak out of the house to meet Roma, but the executioner fails to show up at the appointed time. The warden speaks with a colleague from a neighboring penitentiary facility and introduces strict new rules and order at his own institution.

While Sasha sleeps soundly, Petya, Roma, and Andrey try to figure out how investigator Zhuchkov tracked them down. There's definitely a traitor among them who sold them out—but who? The prison warden arrives at Petya, Roma, and Andrey's place and demands they explain what's really going on in his facility and who organized it all. The trio insists that Volkov came up with the whole thing. Meanwhile, Kostya is sitting in a police cell. The next morning, the warden visits Zhuchkov, whom Kostya has already briefed on the situation. The investigator's colleagues release Volkov. The warden and Kostya meet and agree not to act against each other. Volkov is sent on leave, while the warden deals with the investigator.

The prosecutor, Roma, Sasha, and the doctor devise a plan to execute the Doctor. The killing is scheduled for the night after Andrey's housewarming party. Kostya finds out about everything, but they intend to carry out the murder without him. A rift forms within the team. Natasha has had an abortion without telling her husband. She takes a turn for the worse and is rushed to intensive care. Sasha gets heavily drunk. Prison doctor Petya tries to extract from the Doctor whether he has any contacts who could help cure HIV. Kostya locks the intoxicated Sasha in a cell and goes to the prison warden. He wants to file a report on his colleague. Several conflicts erupt at Andrey's housewarming party.