Police ensign Kalashnikov tirelessly conflicts with his superiors and colleagues. He does not find a place for himself and at home: he rushes about all night long, hiding from imaginary pursuers, which causes concern for his neighbor in a communal apartment. Soon Kalashnikov falls under suspicion of murder.

The corpse of an employee of the funeral home Oleg Yudin with a sewn-up mouth was found. A certain Martynov, the owner of a private morgue, falls into the circle of suspects. Under pressure from the investigation, he admits that, while receiving money from hospitals, he did not cremate the deceased, but buried them in a landfill near his crematorium. But who could benefit from having access to so many unaccounted corpses? It turns out that many of the dead who were discovered were involved in contract killings, and remained unsolved. Investigators meet with Martynov's brother, business consultant Troyanovsky, who taught Martynov the art of management, and find out who was behind the chain of mysterious deaths ...

Sisters Olga and Svetlana Martynovs quarrel over the conditions of the funeral of their deceased mother Polina - Olga insists on the funeral of her mother with her beloved ring, and Svetlana wants to carry out cremation according to the agreement drawn up by Polina shortly before her death. However, the ring disappeared without a trace, and Polina was cremated. Soon Olga is found dead, and the examination establishes that the cause of death is a drug overdose. After interrogating Svetlana, investigators learn that the ring was very valuable. The deceased Olga suspected the previously convicted groom of her sister Khromov, but he turns out to be not involved in either the theft of the ring or the murder, but someone clearly wants to set him up ...