Sesshoumaru, resentful of his half-demon brother Inuyasha inheriting their father's revered sword, Tessaiga, while he received the healing Tenseiga, becomes even more embittered upon discovering that Tenseiga's sole destructive ability, perfected by himself, was meant to be passed to Tessaiga. Feeling abandoned for an undeserving sibling, Sesshoumaru is manipulated by Inuyasha's foe Naraku, who offers a way to steal Tessaiga's powers. As the brothers clash in a battle orchestrated by Naraku, the outcome will determine if Inuyasha can foil Naraku's treacherous plot, win Sesshoumaru's recognition, or succumb to the threat posed by his own kin.