Paul Keeley is a member of the human Resistance against Skynet's Al-driven assault on humanity in 2029. But he's being brainwashed by Skynet in their effort to infiltrate John Connor's Resistance. Paul must regain control of himself and aid in the capture of a T-X Terminator model, which is trying to use him to gain information with which to defeat the human insurgence. Meanwhile, John Connor must do what he can to protect the Resistance from possible infiltration, by Keeley or the T-X. Paul Keeley still suffers from the after effects of his brainwashing. There are lingering hallucinations of a dual reality, one where he communicates with Eliza, a beautiful woman who's actually a T-X. When he's drawn into contact with her, she assumes his identity and sets out to kill John Connor and Kate Brewster. The real Paul gets to them first to warn them, but now nobody trusts Paul, not even himself, and if he doesn't come through for John and Kate, all of mankind will be lost.