Harald Hauser

World-famous geneticist Professor Hülsenbeck is a man of integrity who refuses to mix science and political gain. When his findings are being used to harm humanity, he immigrates to the USA in 1933 in protest against Nazi racial politics.

In November of 1939, the British consulate in Norway receives documents saying that the Nazis are conducting secret rocket research in Peenemünde. But the British doubt the authenticity of the so called "Oslo report". Thus, the Germans continue their experiments unimpeded. At the same time, resistance groups from France, England, Poland, and Germany try to find and to sabotage the secret Nazi research base. When the first "V 2" rocket is successfully launched, the Allied commanders finally become interested in the "Oslo report".

In an act of friendship and solidarity between two mining towns in 1929, the locals of Kriwoj Rog, Russia, give their flag as a gift to the locals of Bergstedt, Germany. This quickly takes on a symbolic meaning for the miners in Bergstedt as the Nazi party demands that this Soviet gesture be erased and the flag be replaced with their own. The miner and communist party functionary Otto Brosowski (Erwin Geschonneck) publicly declares it his duty to defend this flag against every danger, and he keeps his promise despite his family being threatened by torment and torture.

The November Revolution of 1918 in Germany, famine and social upheaval evoke a response from the young Soviet government in Russia. To provide food assistance, trains with bread are being formed. One of them, on the personal instructions of V.I. Lenin is accompanied by the young revolutionary Tatyana . On the way, she meets a former German prisoner of war, Kurt . A romantic relationship arises between them. The train with bread, despite all the difficulties, was delivered. In a clash with a detachment of counter-revolutionary German troops, Tatyana was wounded. She returns to Moscow, and Kurt goes to Berlin to continue the revolutionary struggle.