Subaru Sumeragi is the Sumeragi Clan's 13th and most powerful onmyouji. Subaru has been recruited to exorcism a construction site, but his boss has inexplicably passed away. The lone suspect is a man who has walked away from circumstances where he should have died several times. Subaru then encounters a young woman who is determined to curse the guy, claiming that he murdered her brother. Subaru, with the assistance of his buddy and twin sister, Seishirou Sakurazuka and Hokuto Sumeragi, must determine out how his boss died and defeat the evil spirits that are protecting him.