Description：Chen Nian (played by Zhou Dongyu) is a senior high school student who is about to take the college entrance examination. The suicide of a girl from the same school, Hu Xiaodie (played by Zhang Yifan), has plunged her life into hardship. After Hu Xiaodie's death, Chen Nian was bullied by a trio headed by Wei Lai (played by Zhou Ye). Although Wei Lai appears to be a well-behaved top student on the surface, he is actually vicious. Hu Xiaodie's death is inextricably linked to her. By chance, Chen Nian met a gangster named Xiaobei (played by Yi Yang Qianxi). As time went by, sincere feelings developed between the two who cherished each other. Xiaobei promised Chen Nian that he would secretly protect her from Wei Lai's bullying, but he did not expect that this decision would trigger a series of chain reactions. Zheng Yi (played by Yin Fang), the police officer in charge of investigating the cause of Hu Xiaodie's death, vaguely sensed the weird atmosphere on campus, but his investigation was inconclusive.