Siegfried, son of King Sigmund, hears of the beautiful sister of Gunter, King of Worms, Kriemhild. On his way to Worms, he kills a dragon and finds a treasure, the Hort. He helps Gunther to win Brunhild, by using a mask that makes him invisible. But because Brunhild is cursing Kriemhild, she tells her what really happened. Now Brunhild wants Siegfried's head.