Cao Yongl

Tim Sir (played by Wong Chun-wah), a senior chemist in the Legal and Political Department, has extensive knowledge. Thanks to his superb physical evidence examination skills, he has solved many strange cases. His subordinate and close friend, Sam (played by Lin Wenlong), is also an outstanding forensic expert. Recently, he is preparing to get married to his long-time girlfriend, Ting Ting (played by Zhong Jiaxin)

Legend has it that there was an unknown period in ancient times. Although Daoist Master Wujian is in his twilight years, he has been stationed at Qingfeng Mountain for many years to subdue demons and protect the exit of the demon cave. The ten-year appointment was approaching. General Black appeared and engaged in a fierce battle with Daoist Master Wujian for dozens of rounds. Although it was hard to determine who was superior or who was victorious, both were seriously injured. General Black was severely weakened and turned into a baby

Because his son He Jiabao (played by Wong Ho-yan) died in an unexpected car accident, He Qiu (played by Cheng Chak-sze), who was under the pressure of the entire family, had to return to his position as a taxi driver. After He Jiabao was released from prison, he became his father's partner. Unexpectedly, another car accident brought the bond that had just been established between father and son

Gao Yanbo (played by Wong Chun-wah), a calm and rational senior laboratory technician in the Legal and Political Department, has an extraordinary insight. With just a hair or a piece of clothing fiber, he can assist the police in solving cases. But what he didn't expect was that his wife's younger brother, Gu Zechen (played by Lin Wenlong), a forensic doctor, and senior inspector Liang Xiaorou (played by Meng Jiahui), were both pregnant