Isao Ryotora is dispatched to the remote mining village of Seibo Mura following a bizarre attack by various creatures from the spirit realm known as yokai. As a shugenji, one who can communicate with the kami, Ryotora is not a warrior and he has little experience dealing with yokai. Not that anyone has really dealt with a situation like this before where so many unrelated yokai went from simple harassment to murderous destruction over the three nights of the full moon. The entire situation is made even more uncomfortable due to the presence of a scholarly samurai of an influential family, Asako Sekkin. His elegant manners only remind Ryotora that he was born a peasant in this very village before being adopted into a samurai family, but Sekkin is determined to help Ryotora with his investigation. This is because he has been plagued by a dog spirit that has allowed him no rest until he arrived in Seibo Mura. A great evil is rising but with Sekkin's knowledge of yokai folklore and Ryotora's skills as a shugenji they might be able to unravel the secret history of this place and save the empire.