A blundering Hong Kong police inspector, Ma Yu Long, goes under cover to investigate a high-class businessman, Teng Kuo Chiao, who was bribing city planning officer Ma Yu Yu to build roads to suit his needs and is suspected to be liable in Yu's death. In the meantime, Long courts Yu's high school sweetheart, Julia, who wants the inspector to cheat Chiao out of some money as part of the revenge deal.
| Actor | Role |
|---|---|
 Lawrence Cheng Tan-ShuiSgt Ma Ju-Lung / Pink Dragon | Sgt Ma Ju-Lung / Pink Dragon |
 Rosamund Kwan Chi-LamJulia | Julia |
 Waise Lee Chi-HungInsp Shih Ching | Insp Shih Ching |
 Damian Lau Chung-YanTeng Kuo-Chiao | Teng Kuo-Chiao |
 Nina Li ChiTan Lan-Ching | Tan Lan-Ching |
 Vindy Chan Wai-YeeMa Ju-Feng | Ma Ju-Feng |
 Tony Leung Ka-faiMa Yu-Yu | Ma Yu-Yu |
 Kenneth TsangChief Insp Pao | Chief Insp Pao |
 Lawrence Lau Sek-YinFatty Lan | Fatty Lan |
 Kingdom Yuen King-TanEmmanuelle | Emmanuelle |
 Brenda Lo Yip-MeiFatty Grandma | Fatty Grandma |
 Angela Fong Hiu-HungMrs. Ma Yu-Yu | Mrs. Ma Yu-Yu |
 Peter Lai Bei-DakPeter | Peter |
 Fruit ChanPopsicle seller | Popsicle seller |
 Teddy Chan Tak-SamTeddy, CID | Teddy, CID |
 Dion LamNot listed | Not listed |