Kriemhild's Revenge immediately picks up the action from the end of Siegfried. The now-widowed Kriemhild is off on a mission of vengeance against her uncle, Hagen Tronje, whom Brunhilde pushed into murdering Siegfried. In order to accomplish her revenge, Kriemhild marries King Attila, invites her family members over to her new home, and then has Attila's men go gleefully on a massacre.