Momo, a high school girl from a family of spirit mediums, and her classmate Okarun, an occult geek, set out on their latest adventure, traveling to a hot springs town home rented by Jiji, Momo`s childhood friend and former crush. They plan to solve the mystery surrounding his family. When they arrive, strange locals derail their investigation before it can begin, and the group soon learns there`s more lurking under the surface of the town than they could possibly have imagined.