InuYasha Movie 4: Fire on Mystic Island DVD

Within the dark recesses of Horai Island, a group of half-demons lives under the demonic rule of the Four War Gods. Escaping with barely a shred of hope, Ai, the youngest of the half-demons, returns to the island with Inuyasha, who must face not only the Four War Gods, but also the past he left behind on the island fifty years ago.