After serving in the army, Lieutenant Pavel Starina returns to his native city of Rogatin. He gets a detective at the local police station. His first case is the loud murder of engineer Aseev. The killer left a knife at the crime scene, which the townspeople identified, indicating that it belonged to the hunter Shabashnikov. But something tells the lieutenant that the hunter is not guilty of a crime. He begins an investigation, with each step approaching a solution.