During an academic lecture, art instructor Shen Yi is publicly accused by student Su He of seducing her with promises of an overseas exchange placement in return for a relationship and taking 200,000 yuan from her. Shen Yi immediately calls the police to prove his innocence, but a secretly recorded video triggers online harassment and gets his classes suspended. As chat records, audio recordings, and photographs are carefully examined, the truth emerges: Su He, whose romantic feelings were rejected, joined forces with Fang Qiming, who envied Shen Yi's professional promotion, to fabricate evidence. In the end, Su He withdraws from school, Fang Qiming is disciplined, and Shen Yi clears his name and returns to the lecture hall.