The action of the movie takes place during a possible future war. A foreign state is preparing an attack on the Soviet Union. Professor Runge in his laboratory conducts an experiment with a new deadly gas. The plan of aggression is carried out. On a major Soviet industrial center the enemy command sends squadrons of planes with high-explosive and chemical bombs, with an airborne landing force led by White Guard officers.
as Ognev, chief of Sovier air defence
as Galina, Ognev's sister
as Karl Runge, engineer
as Professor Runge
as General Vahr
as Colonel Massalskiy
as Chief of aviation
as Staff captain Blagonadyozhnyh
as Master Akim Ivanovich
