Beginning from where "Matrix Reloaded" ended, the technologically-gifted Neo remains unconscious in the real world, his mind caught by the devious Merovingian and placed in a mysterious subway station construct. The man known as Bane is still a servant of Agent Smith, who continues to grow in power and ability. Meanwhile, the deadly sentinels are coming dangerously close to humanity's last sanctuary, the underground city of Zion. A final battle between humans and machines becomes inevitable.