Zhezhi and his good friends stayed in school to prepare for the cultural festival. The seven of them played a game of telling ghost stories. Soon the teacher came with Zhezhi's sister and urged them to go home. Before leaving, the monitor who liked ghost stories suggested that they use the charm to play "Happy Sachiko" to pray that the friendship of the seven of them would last forever and stay together forever. However, when they finished the ceremony, strange things happened. The classroom suddenly shook violently, and after a loud bang, the ground collapsed, and everyone fell in. When they woke up, they found themselves in an old elementary school building. The doors and windows of this abandoned school were closed, and it was scary and weird. Naomi found the unconscious Shi Yizi, and the two then acted together to try to leave this terrible school building. But something even more terrible was waiting for them later, and the victims appeared one by one. In this ancient school called "Tenjin Elementary School", who is controlling all this...