In the corner of the dark web in the digital age, psychologist Su Yuhe runs the "Prism Psychological Clinic", which specializes in healing the trauma of victims of online violence. When she discovers that the patients' traumas all point to the mysterious "Emotion Factory" APP, she joins forces with Jin Chenzhou, a hacker who follows technological ethics. The two used the "Public Opinion Spectrum Analysis System" as an edge to track the spread of emotional viruses without touching user privacy, and used cognitive behavioral therapy algorithms to crack the information cocoon. Facing the confrontational frenzy created by algorithms, they insisted on a dual-track approach of psychological intervention and technical governance, which not only helped the perpetrators regain their rationality, but also promoted the introduction of the "Internet Emotional Safety Law" and wrote a warm chapter of technology protecting online civilization at the interface between the dark web and reality.