Chief B (Danny Lee) is an unconventional CID member who relies more on instincts rather than by the book to resolve situations. He's a down-to-earth fellow who's a mamma's boy, not too well-educated, and an outstanding member of the CID. Police Officer Kit (Eddie Chan) has just been promoted from the rank-and-file to CID, and at the same time is studying for the test to become an Inspector. Chief B takes him under his wings to investigate numerous gang-related cases. Kit, previously a by-the-book type of police officer, learns a lot from Chief B.
| Actor | Role |
|---|---|
 Danny Lee Sau-YinChief B | Chief B |
 Eddie ChenYip Che Kit | Yip Che Kit |
 Tai BoDruggy Shing | Druggy Shing |
 Parkman Wong Pak-ManBlacky | Blacky |
 Joh Chung-SingApache | Apache |
 Ou-Yang Sha-FeiChief B's Mother | Chief B's Mother |
 Patricia Chong Jing-YeeKit's Girlfriend | Kit's Girlfriend |
 Yu Miu-LinHawker That Gives B Hard Time | Hawker That Gives B Hard Time |
 So Hang-SuenPolice Madam | Police Madam |
 Shing Fui-OnApache's Man | Apache's Man |
 Joseph Chi Chiong ChavezNot listed | Not listed |
 Tony Leung Hung-WahNot listed | Not listed |
 Kam Hing-YinNot listed | Not listed |
 Benny Lai Keung-KuenNot listed | Not listed |
 Johnny Cheung WaNot listed | Not listed |
 Stephen Chang Gwong-ChinNot listed | Not listed |