With their greatest foe seemingly defeated, Inuyasha and his friends begin to return to their lives. But their short period of peace is once again shattered as a new enemy begins to emerge. Kaguya, the self-proclaimed Princess from the Moon of legend, begins a plan to plunge the world into a perpetual night of the full moon. Inuyasha, Kagome, Miroku, Sango and Shippo must once again unite to face the new threat.