In a world where the peace between Asgard, Helheim, and Midgard is crumbling, Grimgerde discovers her hidden destiny as a god slayer. After a mysterious transformation that grants her the power to destroy the gods, she learns from Sigrun that she must "overwrite" magical seals hidden within her fellow Valkyries through sexual arousal to unlock the path to the god's throne. Grimgerde begins this process by claiming Helmwige and Gertrude, setting a course toward the ultimate downfall of Asgard.
The protagonist continues his mission to unlock the keys within the Valkyries, subjecting Grimgerde and Gertrude to overwhelming pleasure to break their resolve. Along the way, a shocking truth is revealed as Hel is unveiled as the entity inhabiting Svanhvit's body, manipulating the situation for her own entertainment. As the protagonist works toward his destiny, he continues to tame the war maidens, pushing them to their limits to secure the remaining keys.