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, the fox demon Yu, who likes humans, and the immortal Xunhuo, who hates humans, formed 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 use inhumane methods to transform the human body. 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?