As the story goes, an urban legend tells of a girl named Hikiko Mori who suffered severe bullying from her peers, which tragically led to her accidental demise. Her spirit, fueled by resentment towards bullies, now lingers in her old school, gradually amassing the power needed to seek revenge on the living. A terrified group of schoolgirls decides to delve deeper into these rumors, and what they uncover convinces them that they must put an end to Hikiko-san’s haunting before it’s too late.