The film is dedicated to the activities of Osoaviakhim (Society for Assistance to Defense and Aviation and Chemical Construction). Collective farmers of different sexes, ages in different regions of the Soviet Union are studying the device of a machine gun, a rifle, a gas mask; are engaged in a sanitary circle; conduct exercises on protection against chemical weapons. Classes at the Voronezh flying club. Seeing conscripts in the army. Maneuvers of ground, air and tank forces. Red Army soldiers, officers of one of the units at a gala dinner, folk festivities in one of the collective farms of Ukraine.