Ten years after the events of the original, a reprogrammed T-800 is sent back in time to protect young John Connor from the shape-shifting T-1000. Together with his mother Sarah, he fights to stop Skynet from triggering a nuclear apocalypse.

It's been 10 years since John Connor saved Earth from Judgment Day, and he's now living under the radar, steering clear of using anything Skynet can trace. That is, until he encounters T-X, a robotic assassin ordered to finish what T-1000 started. Good thing Connor's former nemesis, the Terminator, is back to aid the now-adult Connor … just like he promised.

All grown up in post-apocalyptic 2018, John Connor must lead the resistance of humans against the increasingly dominating militaristic robots. But when Marcus Wright appears, his existence confuses the mission as Connor tries to determine whether Wright has come from the future or the past -- and whether he's friend or foe.

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?