Zhang Sanfeng, an ordinary high school senior, sees the gears of fate suddenly turn during a routine mock exam.
He transmigrates to a bizarre parallel world where an unseen terror hangs over the school, and incomprehensible Rule Horrors lurk everywhere.
As soon as he arrives, Zhang Sanfeng faces an unprecedented crisis.
In the strange, eerie school, the cold, mechanical rules read over the loudspeaker ring like a death countdown, constantly warning him: one wrong step, and he'll be doomed beyond redemption.
Fortunately, he meets Li Yang, and together they embark on a journey to survive.
Along the way, they also meet Lin Yue, Zhao Yu, and other companions, forming a survival team.
As they explore the school, they encounter countless deadly dangers.
A curse triggered by a book in the library, a shadow relentlessly chasing them through the cafeteria after they break the rules while getting food: every narrow escape deepens their fear of this world, and the team gradually loses members.
Yet they never give up on their hope of escaping.
During one of their many expeditions, Zhang Sanfeng, Chu Tianqiu, and the others reach an illusionary world filled with magic, where the rules are entirely different from those at the school. In reality, however, this world of illusions was created by the school's rules. The group gradually learns to use magic to defeat their enemies and escape this world.
But they know that escaping this world will only take them back to the school's Rule Horror world. They must keep striving to escape from there, too.
