Miura Kyoji, a skilled kendo student, learns that his sensei Tate Masanari is actually Yawaru, a reincarnated Incan warrior who seeks to destroy the world to purify it. This revelation is complicated by the fact that Kyoji is himself the reincarnation of Bilka, who thwarted Yawaru's plans in a past life. As Yawaru awakens other spirits with the power of nature, Kyoji must confront the possibility that he is not just a vessel for the reincarnated soul, but also a distinct individual with his own identity and purpose.