The Second World War drama concludes, with Greta sent to sing for the troops on the eastern front, where she meets Charlotte, Wilhelm and Friedhelm again two years after their last meeting. It is the eve of the German offensive Operation Citadel, and the brothers are preparing to go into battle. The singer misses her plane back to Germany and is stranded in Russia, while Viktor has managed to flee from the train that is heading to the concentration camp.