In the olden days of Japan, people lived in the same realm as demons. These monsters were strong enough to wipe out a village or even a fortified castle. To stop these demons from taking over, there exists a group of exorcists who use their powers to rid the world of harmful demons. Kaname is an exorcist who travels from town to town and helps the people get rid of the demons who possess humans or attack them. But there is something different about her that separates her from the other exorcists. Something dark and evil inside her...