A decade has passed since John Connor prevented Judgment Day and saved mankind. Now 25, Connor lives "off the grid" -- no way to be traced by SkyNet, the network of machines that tried to kill him and to wage war on humanity. Until out of the future steps the T-X, sent back through time to complete the job left unfinished by her predecessor, the T-1000. Now, Connor needs the help of the Terminator to defeat the technologically superior T-X or face the apocalypse and the end of human civilization.