When John Connor, leader of the human resistance, sends Sgt. Kyle Reese back to 1984 to protect Sarah Connor and safeguard the future, an unexpected turn of events creates a fractured timeline.
In 2018, a mysterious new weapon in the war against the machines, half-human and half-machine, comes to John Connor on the eve of a resistance attack on Skynet. But whose side is he on, and can he be trusted?
A machine from a post-apocalyptic future travels back in time to protect a man and a woman from an advanced robotic assassin to ensure they both survive a nuclear attack.
A human soldier is sent from 2029 to 1984 to stop an almost indestructible cyborg killing machine, sent from the same year, which has been programmed to execute a young woman whose unborn son is the key to humanity's future salvation.
A cyborg, identical to the one who failed to kill Sarah Connor, must now protect her ten year old son John from an even more advanced and powerful cyborg.