Between the Kingdom and the Empire— Roa, the Black Witch, lives in the "Great Sea of Trees," a demonic forest spreading between two great nations. One day, at the site of a battle, a dying soldier entrusts a baby to her. The baby, named Claire, grows up to reveal a talent for the rare "Unique Magic," and furthermore surprises Roa by speaking of her "memories of a past life living on a planet called Earth." Fascinated by Claire's talent, Roa has her train as an apprentice witch, and Claire grows into a "Puppet-Master Witch," utilizing the knowledge and technology from her past life. Meanwhile, outside the "Great Sea of Trees," driven by wicked intentions, suspicious figures from the great nations begin to stir, moving toward the forest──