The team from the Spirits and Such Consultation Office—Arataka Reigen, Shigeo "Mob" Kageyama, Ritsu Kageyama, Katsuya Serizawa, and the spirit Ekubo—sets off for Zebra Prefecture to unwind at a hot‑spring resort. The entire excursion is fully funded by the proprietor of Ibogami Hot Springs, who has requested Reigen investigate rumors of supernatural activity nearby.
During the train journey to the lodge, the weary Reigen and Serizawa quickly drift into sleep, only to awaken finding themselves in a spectral alternate realm. Confused by the sudden shift, they must locate an escape route before their leisure day ends and return to the soothing waters of the Ibogami Springs before sunrise in time.
