In the great battle, Hagen is severely wounded and Siegfried is celebrated as a hero. Gunther recognizes the need for new allies. The Roman Aetius demands Burgundy as a colony and Kriemhild as his wife, which enrages Hagen.

Siegfried, Hagen, and Gunther are captured by the Valkyries and taken to Isenstein Castle. Gunther must defeat Brunhild in single combat to win his war. To do so, he makes a dangerous pact...