In the aftermath of Judgment Day and the machine takeover, resistance leader John Connor (Christian Bale) must counter Skynet's plan to terminate mankind. Rallying his underground street fighters for a last, desperate battle, he realizes that to save the future he must rescue his own father Kyle Reese (Anton Yelchin). But the most shocking discovery comes with the arrival of Marcus Wright (Sam Worthington), a mysterious loner from the past who challenges Connor with an impossible choice and leads them both on a brutal journey into the heart of the enemy.