The movie tells about the first years of Nazism. In the center of the plot is a German student graduating from an institute and receiving a diploma with a gold medal for success in science. The same is honored by his Jewish friend Joseph Voltmeyer. During the solemn ceremony, Nazi students provoke a fight, beat Joseph and Ruddy, who stood up for him.

The end of the 1920s. The capitalist world is in crisis. The fascists unleash war against the Soviet Union. The enemy attack interrupts the peaceful labor of Soviet people. Hundreds of production workers join the Red Army. At the front go Red Army units, columns of tanks, units of the people's militia. Enemy airplanes appear over the Soviet city, black bomb bursts are rising. The streets are moving mournful funeral processions of the first victims of the war. At the end of the movie, a worker appears on the screen, appealing to the audience to be ready for the war, which has not yet come, but will come “maybe tomorrow"

A wise and forgiving communist leader decides to send a young worker, Karl Renn, as an international delegate to the Soviet Union after the worker had deserted a picket-line and had expressed doubts about the methods of class struggle in in his own country.