The time is the Warring States Period. The various demons, monsters, and other non-human spiritual creatures in the world are collectively called "Darkness". The Dark, who likes humans, is called Yaohu Yu, and the immortal, who hates humans, is called Xunhuo. They set up a group called "Savior Sisters and Brothers" to carry out the salvation activities of sweeping away evil. On the way, they met the warrior head Shinsuke. There is also a group of monks who specialize in dealing with Darkness. In order to eliminate the Dark "obstacles" that do evil to humans, they transform the human body in an inhumane way. Xunhuo and others have a fierce conflict with them! There are also bad people among humans, and non-human beings are not necessarily evil. Xunhuo hates humans very much because of the past, but during the journey, he gradually witnessed the good side of humans. Can he change?