Gao Daxi (played by Lai Yiu-cheung), who came to Hong Kong to attend the funeral, was recommended by his father's friend to join the police force. During another gambling operation, a bullet penetrated Daxi's head, and his brain cells were activated and evolved. He turned into a super-intelligent detective, Columbo, who could solve all cases. But at the same time, his emotional intelligence management area gradually shrank, and his temperament changed seriously. In the eyes of the citizens, he is a detective, in the eyes of the gangsters, he is a nemesis, but in the eyes of his colleagues in the police force, he is an unkind and cold-blooded animal. Security Secretary Jin Louis (played by Joe Junior) urgently recruited his daughter Jin Yiwa (played by Ma Sai), who had just graduated from Scotland Yard, to return to Hong Kong, and arranged for police officer Cai Feilong (played by Xiao Zhengnan) to be his assistant to monitor Daxi's whereabouts day and night. Daxi used a little trick to win Eva's heart, but Eva also admired Feilong, who was excellent in business, and was caught in a dilemma. Mei Mei (played by Natalie Tong), who had regretted her marriage with Daxi, went to Hong Kong to find her daughter. When she learned that Daxi was unmarried, she decided to renew her relationship with him...