In a world that worships the Almighty Eye, two siblings find themselves escaping from sacrifice, only to discover their world is not what it appeared to be.

Long time ago, a mighty king, while protecting his kingdom, hunted all the monsters down and eliminated them. Nowadays, with no monsters left, he lost his purpose of living and falls into depression. The princess, trying to get her father back to his former state, sets up a fanatical plan...