Li Xiaogen and Liang Zhongning returned to school late at night and accidentally entered the "Yin Yang Road". Li Xiaogen ran into the terrifying "Human Head Tree", and strange things happened frequently after that. School doctor Sun Zhaobin died in a "nail tree", leaving the word "" in blood before his death. Li Xiaogen was threatened by netizen "Yi Mu" and had conflicts with Liang Zhongning and his girlfriend Xiao Xingting due to misunderstanding. As Yang Peng, Feng Jie and others were involved one after another, everyone suspected and plotted against each other, and unexpectedly discovered that the evil spirits related to "Mu Yue" were at work. In the end, Li Xiaogen and others tried to work together to break the curse, but they did not know that there was another sacrifice behind the plan, and the true identity of "Yi Mu" and the secret of "Tree on the Head" gradually emerged.
