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Chen Yutong, a girl's middle school student, was bullied at school, but her mother Li Han was unable to save her daughter from the "hell." Everyone around her turned a blind eye, and a collective silence brewed greater violence.
Three students from Jing Mu Girls’ Middle School go missing and turn up dead. Xiao Tong, a special education student with speech impairment, feels like someone is watching her. During the rehearsal for the school’s foundation day event, a corpse falls from the ceiling of the auditorium, and Xiao Tong disappears in the midst of confusion. Her mother, Li Han, who has been working at the school to be close to Xiao Tong, begins her pursuit.
Fifteen years ago, a group of powerful and corrupt individuals of varying backgrounds turned Doma City into a "hell island," where high school student Xiaodi was brutally raped and killed. Fifteen years later, these manipulators behind the scenes meet a series of gruesome deaths. Fang Tianyang, who witnessed the murders fifteen years ago, and police officer Fang Zhengnan delve into the investigation, only to discover that this anonymous killing is not merely revenge, but a belated indictment. A series of murders, layers of darkness—how many untold sins lie hidden behind the black web woven by power, money, and desire?