[DeepL Translation - needs review] It has been a year and a half since Kiyoshi Mitarai left Japan. Ishioka, a mystery writer and friend of Mitarai's, goes to Okayama Prefecture to exorcise an evil spirit at the request of a woman named Ninomiya, who comes to visit him unexpectedly. Following the spirit's lead, the two get off at a lonely train station and venture into the mountains, arriving at a bizarre ryokan called Ryugakutei. There, Ishioka encounters a series of horrifying mass murders....
