An ophthalmologist, secretly suffering from schizophrenia and following his own theory of treating the disease, conducts experimental operations on mentally ill patients. He kills a psychiatrist, whose unexpected intervention could reveal his secret.

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 ...