Fifty years ago, Inuyasha and Kikyo discovered the legendary Horai Island � a place which only appears out of the mists every few decades. During that time, they found several half-demon children who were subject to the demonic rule of the Four War Gods, but had to leave before they could do anything about the situation. In �modern� feudal times, the island reappears and one of the children escapes, seeking out Inuyasha to rescue them all from the Four War Gods. Can Inuyasha liberate the children with the help of the Tetsusaiga, before the island once again disappears into the mists?