Berlin, 1932. The Weimar Republic is torn apart in the struggle between right- and left-wing extremists and Berlin is a powder keg. Nightclub singer Henny Dalgow get to know the Social Democratic congressman and Jewish doctor Albert Goldman, and the two become a slightly odd couple. Albert is a sworn pacifist after his experiences in the First World War. Contrary to his beliefs he agrees to act as courier for his brother Edwin, who belongs to a radical communist cell.