Chief B (Danny Lee) is a member of the CID who doesn't follow the rules. He relies more on instincts than on the book to solve problems. People like him: He's not too well-educated, but he loves his mom and is a great member of the CID. Police Officer Kit (Eddie Chan) has just been promoted from the rank-and-file to the CID. At the same time, he is preparing for the test to become an Inspector, which will make him an Inspector. Chief B takes him under his wing and helps him look into a lot of gang-related cases. Kit, a police officer who was always following the rules, learns a lot from Chief B.