Ray Tango and Gabriel Cash are two successful narcotics detectives who can't stand each other. Crime lord Yves Perret, furious at the loss of income they have caused him, plots an elaborate revenge against them.

In the post-apocalyptic future, reigning tyrannical supercomputers teleport a cyborg assassin known as the "Terminator" back to 1984 to kill Sarah Connor, whose unborn son is destined to lead insurgents against 21st century mechanical hegemony. Meanwhile, the human-resistance movement dispatches a lone warrior to safeguard Sarah. Can he stop the virtually indestructible killing machine?