The Queen of the Underworld's Revenge

Hela, the Queen of the Underworld, is betrayed and killed by Loken, a man who claims descent from a false god. Freyja turns back time and sends her ten years into the past, where she publicly strips Loken of his privileges and exposes the lie of his supposed rescue. She teams up with the exiled God of War, Kael, and uses a master-servant contract to keep Loken under her control as bait against a priestly family's scheme. Her plan soon reaches toward an ancient fire god who threatens the end of the world.