Two murders occurred in Luteng City, and the victims were all female online anchors. The criminals pretended to be takeaway deliverymen and broke into the house to kill people. The means of committing the crime were cruel and bloody. Through a series of data analysis, policewoman Tang You (played by Peng Bo) confidently deduced that anchor Sang Nannan was the murderer of the other two female online anchors, and a live video of Sang Nannan being tied up was immediately reported. After Fang Mu (played by Chen Ruoxuan) appeared, he suspected that the murderer was Shen Xiang in the conversation with Sang Nannan. Unexpectedly, he got the news of Shen Xiang's death before he finished speaking. Finally, Fang Mu locked the suspect as Shen Xiang's boyfriend Luo Jiahai based on clues such as "glasses", "height", and "stains on Shen Xiang's body". Through Shen Xiang's suicide note, Sang Nannan's live broadcast details and other clues, he found that the person who really suffered from PTSD was Luo Jiahai himself. Director Xing Zhisen's daughter Xing Na and her classmates were bullied in a KTV. The manager reported the case to blackmail Xing Na, but Xing Na later brought in Tai Wei (Wang Longzheng) to help, and the arrogant manager backed down. Later, Xing Zhisen was shot and fell into a coma while trying to save Xing Na, and Xing Na disappeared. Fang Mu and Tai Wei (Wang Longzheng) tracked down the case, and a case of trafficking women for second-child surrogacy for clients surfaced. While looking for Xing Na, Fang Mu found out that this was a serial hypnosis murder case that was educating society in the name of justice.