During the 21st century, humans and machines interact with one another. This begins a brand new age for humans as they are more developed and not only living on Earth, but in outer space as well.
However there is a human-machine hybrid known as Doc Terror who was once a robot scientist who lost his humanity when he was transformed into a robot, now builds machines in an attempt to conquer the world.
However, there is only one small force that stands in Doc Terror's way. A special man-machine unit code named "The Centurions". They specially made suits called Exo-Frames they use state-of-the art weaponry to combat Doc Terror's forces.
These Centurions go by 3 names. Cmdr. Maxwell Ray, a former Navy SEAL who operates at sea. Jake Rockwell, a former U.S. Army Ranger who operates on the land. Ace McCloud, a former Pilot of the U.S. Air Force who operates in the air.