In the near future, in order to solve conflicts and problems in the education sector, the Ministry of Education will establish an "Education and Teaching Investigation Center" and set up branches in various county-level cities across the country. Each branch will have investigators to resolve conflicts between home and school, teachers and students, and between schools within the region. Su Rou and Li Sixian are education investigators in Yundu City. In the process of resolving educational disputes one after another, they discovered the amazing secrets of Yundu City's education world - the current situation of the education world written by grassroots teachers is all in "Teacher Detective"!