
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.
Ognev, chief of Sovier air defence
Galina, Ognev's sister
Karl Runge, engineer
Professor Runge
General Vahr
Colonel Massalskiy
Chief of aviation
Staff captain Blagonadyozhnyh
Master Akim Ivanovich