In 1972, a well-liked student named Misaki passed away in Yomiyama North Middle School, class 3-3, casting a shadow over the town with its ominous secrets. Fast forward 26 years, Kouichi Sakakibara joins the same class and senses a mysterious, somber aura among his peers. Intrigued by the enigmatic Mei Misaki, whom everyone else ignores, Kouichi delves into the unsettling truth veiled within the class. As they navigate through eerie occurrences, Kouichi, Mei, and their classmates are entangled in a web of chilling events with fatal consequences, risking everything to uncover the chilling mysteries haunting Yomiyama.