Religious monks adapted to modern technology and weaponry to combat the threat of demons. Ryuudaiji, a monk who's on a journey to locate and purge a demon spirit that is terrorizing a forest which was notorious to be a place where people commit suicides, meets a wolf boy, Tamaki Madoka, and his wolf companion. Things start to develop between the two, after an encounter with a tree demon spirit as Tamaki decides to go to the outside world to learn more about his past.