10 years has passed since the first Terminator unit was destroyed and the savior of man, John Connor has been born. Living with foster parents, he is one day caught in the battle between to more Terminators. One however, has been reprogrammed and sent back in time to protect Connor while the other has been sent to kill him. Now armed with a personal guard, his recently freed mother and more knowledge of the future, Connor and company start on a quest to alter the present to save the future.