In the Line of Duty 4
Two detectives who are up to their necks in trouble and in each other's face, as they try to shut down a drug-trafficking scheme that could be connected with international ties to organized crime. But in the midst of their investigation, innocent immigrant dock worker Luk Wan-Ting gets caught up in the mix when he witnesses the murder of an intelligence operative and is framed for the crime.
- Year: 1989
- Country: Hong Kong
- Genre: Adventure, Action
- Studio: D & B Films
- Keyword: martial arts, detective
- Director: Yuen Wo-Ping
- Cast: Cynthia Khan, Donnie Yen Chi-Tan, Michael Wong, Yuen Yat-Choh, Lisa Chiao Chiao, Wai Gei-Shun