When new student Lin Yu stepped into Yuying Middle School, he thought it was an ordinary campus life, but he didn't want to see dangers hidden everywhere. Strange ringtones, disappearance of classmates, strange movements in the library bookshelves, weird food in the cafeteria... There are unknown secrets hidden behind the campus rules. He and his friend Li Yang test the danger again and again. Can they uncover the truth and break this cursed rule?
