Directed by Aleksandr Ivanovsky.

A squadron of American warplanes, armed with gas developed by Corsican chemist Gannimer (dubbed "Napoleon Gas") flies to Leningrad. American workers inform soviet comrades about the impending catastrophe. But the air attack on the city has already begun, and the assault troops of the enemy capture one suburb of the city after the other. The Red Army is organizing the defense and reflects the attack of the enemy with gas-armed drones

Siberia. 1919 The retreating intervention detachments and the English expedition leave the mines. A snowstorm begins. English engineer Henry and his fiancee Ollan, the daughter of the company director, are lagging behind. After much wandering, the heroes come across the winter quarters of the Russian partisan Vladimir. While waiting out the bad weather, the heroes will be forced to live together for some time. Ollan will be convinced of the worthlessness of his chosen one and the courageous, energetic Vladimir will become her husband. And ahead is spring and painful thoughts: to stay with your loved one in this country or return to your homeland?

An adaptation of Olga Frosh's novel about the life of Mihail Beideman.

About the shooting of a workers' demonstration on January 9, 1905. The film has not been completely preserved.