In the war-torn era when the world was in disorder and the powers were divided, the monk Xiang'an brought an orphan from China to Japan. The orphan was named Zaitaro, and he carried an astonishing secret. After being separated from Xiang'an, the helpless Zaitaro took his dog Feiwan to Wanjue Temple in the country of Akaike, and met the mysterious swordsman "Wuming" on the way. Zaitaro was hunted down, and Wuming saved his life in a critical moment. From then on, the two traveled together. Although the eccentric ronin and the closed-hearted boy kept bumping into each other, they gradually became good friends. The hunting organization led by Bailuan still captured Zaitaro, and they began to prepare for a certain ceremony. The blond and blue-eyed swordsman "Luolang" is also a member of the hunting organization. Although he obeys orders, he does not really care about the purpose of the organization. For him, finding an opponent who can match himself is the meaning of life. The life-and-death duel between Luolang and Wuming kicked off...