When a liquid metal assassin arrives from tomorrow with orders to eliminate humanity's last hope, a reprogrammed cyborg from the past must shield young John Connor at any cost. As the relentless shape-shifting hunter closes in, the boy discovers that his protector—once built to destroy—is his only chance at survival. The stakes escalate into an explosive race against time to stop the rise of the machines.
A cyborg from the future, 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.