Hard Boiled

Original title: 辣手神探

“As a cop, he has brains, brawn, and an instinct to kill.”

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.