World War II veteran Efremov was killed by a shot from a gun in his apartment. Police lieutenant Lamasov and investigator Kreshcheny are involved in the investigation. And although the circle of suspects is narrowing, the motives for the murder remain unclear... moreover, there is a possibility that the victim should not have been Efremov, but his neighbor, the alimony father Alexei Akstafoy, who is hiding from creditors.