1919. After the assassination of the Prime Minister of Bavaria, the Social Democrat Kurt Eisner, the government press secretary, the young communist Viktor Kleist, is accused of complicity in this crime under the pretext that the killer allegedly fired from his office. Viktor is forced to flee from Munich to Berlin, where revolutionary uprisings are unfolding. But the local party cell believes that a comrade with experience of legal work in the government will be more useful in another capacity. Kleist is offered to go to Moscow to deliver letters from German communists to Comrade Lenin asking him to help them in their difficult struggle against the bourgeoisie. Together with Martin Schenzinger, a member of the party's combat organization, and the awkward young man Georges, the son of an old Russian emigrant, who he has forced upon him as his companion, Victor sets off for revolutionary Russia.
