Magdalena and Michael have loved each other since they were children. But when the Nazis come to power, Michael rebels against the regime and is sentenced to fifteen years in a concentration camp. Magdalena, meanwhile, goes underground with the help of a friend and later immigrates to the Soviet Union. Michael, who has joined the Red Army, discovers on the way to Moscow that Magdalena is staying there. But when his plane lands, she is already on her way back to Germany. Michael hopes that one day, he and Magdalena will be reunited.

This film continues the story of radio operator Ludwig Bartuschek from “The Sailor’s Song”. Near the end of the Weimar Republic, Bartuschek (Erwin Geschonneck) is working as a mechanic in the Sperber airplane plant. Director Dehringer offers him the opportunity to train as an airplane constructor if he is willing to give up his communist beliefs under oath. Bartuschek will not allow himself to be bought and instead joins the underground resistance movement.

Berlin, 1936. Athletes and visitors from all over the world have come to the city to take part in the Olympic Games. Anti-Fascists use the opportunity to tell the foreign guests about the situation in Germany by distributing leaflets. Being cornered by the Gestapo, the wounded resistance fighter Jakob manages to go into hiding with the help of the Swiss doctor Thea. They fall in love with each other and when Jakob joins the International Brigades in Spain to fight against Franco, Thea follows him and becomes a dedicated fighter against Fascism. The enduring battle, however, keeps preventing them from becoming a real couple.