Siegfried of Xanten snatches the Nibelung treasure from the king of the underworld and slays the dragon Fafnir, whose blood makes him invulnerable. Siegfried falls in love with Kriemhild, the sister of the Burgundian king. But only if Siegfried helps Gunther marry Brunhild will he be allowed to marry Kriemhild. He fulfills this condition, but the two women bring ruin upon Xanten and Burgundy...

Uwe Beyer
as Siegfried

Karin Dor
as Brunhild

Maria Marlow
as Kriemhild

Rolf Henniger
as König Gunther

Siegfried Wischnewski
as Hagen

Hans von Borsody
as Volker von Alzey

Fred Williams
as Gernot

Terence Hill
as Giselher

Dieter Eppler
as Rüdiger von Bechlarn

Skip Martin
as Alberich