A clan of ninjas finds an abandoned chest that has been washed onto shore, and find a white baby inside. One of their ancient legends spoke of a white foreigner male who would come among the ninja and become a master like no other would. The boy, Haru, is raised amongst the ninja, with the expectation that he may be the one of whom the legend speaks. As Haru grows into adulthood, doubts are quickly cast over him for being the great white ninja. Haru is clumsy and lacking in ninja skills and so fails to graduate as a ninja with the rest of his class.