A veteran cop and an unstable detective become partners who must put their differences aside in order to bring down a heroin-smuggling ring run by ex-Special Forces.
Riggs and Murtaugh pursue a former officer who uses his knowledge of police procedure and policies to steal and sell confiscated guns and ammunition to local street gangs.
With personal crises and age weighing in on them, Riggs and Murtaugh must contend with deadly Chinese triads trying to free their former leaders from prison and onto American soil.
