On the first day of school, the students of Class 2 (3) of Linjiang No. 2 Middle School faced a nightmare beyond their cognition. A cold broadcast instruction resounded throughout the campus: "Students, please stay away from the class teacher in the classroom."
When the familiar class teacher transforms into a terrifying tentacled monster outside the window, when the top student trying to escape instantly melts into a solidified wax figure in the corridor, the ordinary campus instantly turns into a strange and unpredictable Jedi cage. Lin Mo, an unknown student, was in extreme panic when he received the only way out reminder from study committee member Su Xiaosai: "If you want to survive, memorize the last rule of the school rules."
However, this crucial rule pointed to a horrifying paradox - he clearly remembered that the last page of the student handbook handed out was completely blank.
Trapped in the distorted campus time and space, facing teachers who follow unknown rules and sometimes transform into monsters, as well as survivors from other dimensions that gradually emerge, Lin Mo must decipher the truth behind the "blank school rules". He gradually discovered that this familiar campus was connected to countless classrooms in parallel time and space, and the rules of each time and space may be completely different and fatally abnormal. Trust and betrayal are intertwined among the survivors, and the only thing in common seems to point to the "Student Code of Conduct Manual" that seems ordinary but hides the ultimate secret.
