Magically gifted boy Sasuke lives in peace, deep in the forest with his animal pals and Oyu, his elder sister. After their forest sanctuary is violated by a demon witch who devours one of Sasuke's animal companions, he vows vengeance. Leaving the forest, he sets out to master his magical gifts, making a pilgrimage to the home of the wizard Hakuunsai. While Sasuke learns the ways of magic, the demon witch terrorizes the countryside, and Sasuke works to complete his training in time.