Nathan Algren is an American hired to instruct the Japanese army in the ways of modern warfare, which finds him learning to respect the samurai and the honorable principles that rule them. Pressed to destroy the samurai's way of life in the name of modernization and open trade, Algren decides to become an ultimate warrior himself and to fight for their right to exist.
In 1996, brash L.A. detective John Spartan and maniac killer Simon Phoenix are both sentenced to decades in a cryogenic prison as punishment for a rescue mission gone wrong. When Phoenix escapes 36 years later to wreak havoc on the future, Spartan is awakened to capture his nemesis the old-fashioned way.
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.
