A cop who loses his partner in a shoot-out with gun smugglers goes on a mission to catch them. In order to get closer to the leaders of the ring he joins forces with an undercover cop who's working as a gangster hitman. They use all means of excessive force to find them.

1998 film by Johnnie To, Patrick Yau

Three childhood friends from the slums of Hong Kong flee to war-time Saigon after accidentally murdering a gang leader, but their troubles only escalate.

1993 Hong Kong film