This distinctly Russian war story takes place in 1942 behind enemy lines. A regiment of partisans captures former Red Army lieutenant Lazarev who is dressed in a German uniform. He’s a Nazi defector and collaborator but now desires to switch back and fight with Russian partisans.

Three boys are helping Soviet Intelligence to catch German spies during WWII.

The film tells about the fighting everyday life of the crew of self-propelled guns during the liberation of Right-Bank Ukraine. Junior Lieutenant Maleshkin, an unshooted graduate of the school, commands the crew of the self-propelled gun SU-100. All the subordinates of Maleshkin are older than him and much more experienced. The authority of the young commander is tested at every step, he quarrels, then reconciles with his crew. In addition, Maleshkin is very dissatisfied with the battery commander, he now and then threatens to remove the sluggish young officer from the command. In the crew of Maleshkin, various troubles constantly occur: either the driver will catch the commandant’s eyes in an untidy, grimy look, then a combat grenade with a dropped check will be discovered in the car, or a breakdown will occur just at the moment the regiment enters the march. Ending in a sprawling battle against German forces.