Heavenly Host Elementary School was torn down following the murders and disappearances of several of its students and staff members. Years later, a high school named Kisaragi Academy is built on the same site. One evening after the school’s culture festival, a group of students decide to perform the “Sachiko Ever After” charm. If performed correctly they will remain friends for eternity no matter how far apart they may be. However, right after performing the charm a sudden earthquake transports them to an alternate dimension where Heavenly Host Elementary still stands. The halls are haunted by the souls of the murdered children, seeking their own brand of revenge by brutally murdering any living soul they come across. Trapped in this dimension the group of friends has to work together to solve the mystery of the murders, and try to make it out of the school alive.