Amaterasu's younger brother Ssusanoh was expelled from Heaven due to his arrogant behavior. However, Susanoh showed himself to become a hero-god in Ashiwara Nakatsukoku before this when he defeats Yamata no Orochi and saves a girl named Kushinada who was about to be sacrificed. As a hero-god, Susanoh married Kushinada and ruled Izumo no Kuni into great prosperity, before finishing his role and retiring to deep sleep.
Over 100 years have passed, a messenger arrives from Heaven who wakes Susanoh from his slumber. Is this a messenger to inform him of a disturbance in Ashiwara Nakatsukoku? Is the war between the gods of Heaven about to begin?