The hero, a nameless teenage boy in Japan, is trying out his new guitar one sunny day when he suddenly finds himself whisked away to another world. He is woken by Tonto, an otomori and servant of the recently deceased Orochi, one of the seven wise dragons. Tonto informs the hero that he was summoned by Orochi to be his champion, raising and pitting dragon against dragon in a series of battles to change the world.