Ling Jiuxiao, the top universal scholar in the parallel world, traveled to this world due to a space-time rift accident and possessed a poor temporary substitute teacher at Qingyun City No. 17 Middle School. No. 17 Middle School is the worst school in the city. Students sleep in class and fight, and the teacher acts like a monk and beats the clock. Ling Jiuxiao originally wanted to stay low-key and wait until he found a way to go back, but he couldn't hide his comprehensive knowledge that could crush the entire world. The cold-faced physics teacher Su Wantang looked down on him at first, the gentle school doctor Ye Zhiqiu always appeared at critical moments, the wealthy single mother Lu Tingyu was willing to do anything for her son, and the genius girl Bai Luxi insisted on recognizing him as her master. A poor student becomes a top student in his hands, and a bad school turns upside down under his feet. Everyone wants to know - what is the origin of this substitute teacher who does not even have a formal establishment?
