This is a story about the active, dangerous and risky work of the Soviet intelligence officer Ivkin in the rear of the Nazi troops, on the Soviet territory occupied by them. He didn’t have to carry a pistol in his pocket, shoot back and escape pursuit. He was a mechanic at a car repair plant under the false name of Kuzmina. He experienced a lot, met a lot of enemies and friends. Writer Mikhail Skorokhodov and officer Konstantin Ivanov based the story on the facts and work experience of one of their comrades.