Princess Mariya fell in love with doctor Toporkov, who was treating her, in the recent past the serf of her family. Now he has become a celebrity and is only concerned about buying a new home profitably. He does not notice her love and marries a rich merchant. The princess in love comes to see Toporkov and opens to him. Her strong feeling touches Toporkov’s hardened heart, he leaves his wife and leaves the princess abroad.

At the end of September 1941, Soviet artillery troops in besieged Leningrad realize that pretty soon they will fire their last shot, and after that the defense of the city will be doomed. The film is based on a true event: a small group of fearless soldiers transported a large supply of gunpowder through enemy lines to Leningrad.