Over a decade after John Conner (Nick Stahl) helped save mankind from annihilation, he lives in fear and hiding from the machines. Untraceable by Skynet, the highly advanced machine network that once tried to destroy humankind, John is pushed back into the war when Skynet releases its deadliest terminator yet, the female T-X (Kristanna Loken). Sent from the future, the beautiful T-X is intent on killing John, and his only protection is the Terminator (Arnold Schwarzenegger), his former mechanical assassin, upgraded and sent by the human resistance to protect him.