Hundreds of years after his death, Dr. Lights final creation is discovered. Released from his capsule by Dr. Cain, X is born into the world of the future where robot rebellions are a thing of the past. But when Dr. Cain tries to implement Dr. Lights designs into a new series of Reploids, something goes horribly wrong. Now, the future lies on the brink of destruction and X must use all of his newfound powers and abilities to hunt down the maverick Reploids and their leader, Sigma, before the human race is wiped from the planet!