In the ninth era of the Ten Thousand Worlds Calendar, all the stars were extinguished, leaving only the "Ember Star" hanging alone in the eternal night.
Legend has it that there is an "Abyss Gate" hidden deep in the Ember Star, and behind the door is the "Abyss" - the place where the gods abandoned their corpses. If anyone can use blood as the key to open this door, he can usurp the throne of God and reorder the world.