Igor helps Korolev return the gun. However, it turns out that a man was killed with this weapon the day before. Igor tries to fix the situation by studying the life of the victim, and finds a way out. However, his continued stay in the department is in question. Studying the archival file about the death of his mother, Sokolovsky discovers that some of the information has disappeared.

Igor is suspected of killing Karasyov. Out of jealousy, Korolev is silent about the existence of an important witness. Sokolovsky finds Karasev's killer, but he dies before his eyes, without revealing the name of the customer. Igor has reason to believe that his father is keeping something back about the past.