Igor decides to stay in the department, despite the general rejection. He helps to detain arms dealers and gets shot while covering Rodionova with himself. For Korolev, this is a reason to be jealous, for Victoria - to look at the major with different eyes. Sokolovsky and Korolev together detain Alpinist, who shot at Igor. Igor goes to investigator Karasyov, who was in charge of his mother's case, and finds him dead.

Igor is actively working with the task force. Two corpses were found, the cause of death was severe dehydration. Rodionova and her team are looking for a connection and possible witnesses to the crimes. At night, an unknown person climbs into Sokolovsky's apartment. In an attempt to catch up with the criminal, he narrowly avoids a bullet. A friend and partner of his father, Ignatiev, tells Igor about the existence of a certain note.