The drug lord Wenhua (played by Moses Chan) controls more than half of the drug business in Hong Kong. In order to combat this top drug lord, the Narcotics Bureau placed an undercover agent, Ye Haotian (played by Xiao Zhengnan), next to Hua. In the end, Hua was betrayed by Tian, who he trusted the most, and was arrested. Since then, Tian has lost his emotions, fear and sympathy, and even lost the feeling of love for his lover Ding Ruoning (played by Zhang Yiwen). In the eyes of his colleagues, Tian is an unsociable "weirdo" who buries himself in the work of the Missing Persons Investigation Bureau all day long. After being imprisoned, Hua has always requested solitary confinement, hoping to read quietly. 12 years later, Hua was interviewed by online radio reporter Lin Keer (played by Zhang Baoer), and he regretted his past actions in his conversation. Hua was confirmed to have terminal lung cancer, and the SAR government allowed Hua to be paroled on humanitarian grounds. At this time, a murder case of a police officer was directed at Hua who had just been released from prison. Ning asked Tian, who knew Hua best, to return to the Narcotics Bureau. Wah finds the mute Xu Anle (played by Ho Kwong Pui) to help him deal with online drug distribution, and then finds his old love Zhang Lin (played by Nancy Wu) to help him launder money through the stock market. Wah hopes to use the limited time to build his new world...