When the class teacher Huang Wei, all his classmates, and the police all thought that Li Guoguo committed suicide, Yan Shuai refused to accept it. He began to investigate the real cause of Li Guoguo's death. He learned a huge secret from Li Guoguo's two suitors during his lifetime, Wang Yufei and Qin Huaiyang. After peeling away the clouds, he discovered that the person who killed Li Guoguo turned out to be him. Guoguo's parents were blackmailed and her hair grew for six years. Roommates Yan Zigu, Mahler, and Luo Minhao were also involved in the case. Xu Wenwen was attacked unexpectedly. The incident turned around, and there was further progress in the cause of Li Guoguo's death. As expected, Li Guoguo's death was murder. When everyone was panicking, At that time, after Nuan Nuan and Guan Liang were also threatened, Yan Shuai and his girlfriend Nuan Nuan discovered unknown clues to track down the murderer. Murder cases occurred one after another in the school. Freshman Lin Yao was also involved in the murder case. Who is the real murderer behind the scenes?