Migiwa tries to depose Donatus, an evil tyrant, and to rescue his kidnapped sister Kira. He meets Lythtis, a young girl trawelling with a dragon, who seems to be her cursed brother. Lythtis must fight against Donatus too in order to save the sacred land of Olveis. With Kira by his side, the evil Donatus rules Olveis with an iron fist and tries to destroy both Migiwa and Lythtis.