This book mainly tells a series of strange adventures that Lin Xiao experienced on campus. He first discovered mysterious rules in the classroom, and then encountered various strange events, including lights going out, strange sounds, blurred figures, etc. He also found a shabby diary and learned that the campus held terrible secrets.
Lin Xiao encounters a monster in the library, escapes into a room full of mysterious instruments, finds magic secrets, learns magic with Xia Qing and Lu Yu, enters the magical world and defeats the monster. After completing their adventure, they were transported to the campus in 1997, and were tasked with finding and protecting a mysterious magic book. During the search, they discovered that the school's taboo rules had changed, and abnormalities appeared in the bell tower, library, garden, teaching building, etc.
They found a fourth rule added to the blackboard in the classroom, and then launched an investigation and found a forgotten diary. They learned that the school had conducted taboo experiments and that these rules were to protect students. While searching for clues, they found a small hole on the blackboard, entered a warehouse through the switch in the hole, and found the time shuttle.
With the help of a time shuttle, they came to an era where zombies were infested, met Master Lin Zhengying and learned Taoism. During the battle with zombies, they discovered that there was someone behind the zombie transformation. After investigation and fighting, they finally solved the problem.
Lin Xiao gained a deep understanding of Taoism during his practice. He constantly defeated his enemies and improved his strength. After returning to the real world, he found that there were still many strange things in the school, and decided to explore the truth with his classmates.
