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...
Engineer Dukalsky arrives from Moscow on the instructions of an underground anti-Soviet center to the Baltic Shipyard in order to take possession of the blueprints of a powerful ship engine. The pest meets the author of the project - a young and incorruptible self-taught master Ivanov. After a...
