Shu Siman

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)