Fung Kui-

Jiang Jin (played by Chen Xinjian), a scientist who studied in the United States, devoted himself to researching replicants all day long. His wife couldn't bear it anymore and decided to take their son to the court to ask for his death. Jiang Jin couldn't save him and even replicated his son Jia Wei (played by Tony Leung Chiu-wai) and handed him over to his wife to take back to Hong Kong. Later, Jiang Jin also returned to Hong Kong with his son to develop his career and opened a clinic in collaboration with female doctor Cheng Shihua (Ouyang Peishan)

Li Zhijian (played by Tsang Chi-wai), who comes from a criminal family, has aspired to become a police officer since childhood. God rewards the diligent. Finally, taking advantage of the police force's exceptional recruitment of people with disabilities, Li Zhijian, a short man, was able to join the police force as he wished and enter the Drug Investigation Unit. After successfully completing his mission, Zhijian was transferred to the anti-pornography Unit, but was released during the execution of his duties