In a desert world where both demons and humans suffer from an extreme water shortage, Beelzebub, the prince of demons, and Rao, a small-town sheriff, form a tag-team and set off on an adventure in search of the Legendary Spring somewhere in the desert.

In a desert world where both demons and humans suffer from an extreme water shortage, Beelzebub, the prince of demons, and Rao, a small-town sheriff, form a tag-team and set off on an adventure in search of the Legendary Spring somewhere in the desert.