1syuzh. - Moscow proletarian division: military exercises of the division fighters, the offensive of tank and infantry units. Soldiers help a sponsored collective farm in the construction of a power plant. 2syuzh. - Kaluga: streets, buildings, a railroad and diesel locomotive plant. Military exercises of the Osoaviakhim fighters: they shoot from a machine gun, master the driving of tanks. Parade of fighters of Osoaviakhim on the city square. 3syuzh. - Protection of the coastal borders of the Baltic: combat exercises of the coastal artillery battery. The Red Navy men have dinner after lights out. 4syuzh. - Cadets of one of the flying clubs of the Central Black Earth Region. : they check the motors of planes, take off on planes into the air, make parachute jumps.