The Glorft are an aggressive spacefaring hostile species which seek to expand their empire, conquering planet after planet with their militaristic weaponry and enslaving other species as they go. At some point in the distant future, the Glorft invade Earth and enslave humanity, but when a giant robot prototype stolen by Human rebels to defeat them is accidentally sent to the past, history itself might be altered. The Glorft fleet, led by Gorrath, travels back to the 21st century to prevent that from happening, but are regularly defeated by Coop and his friends, since they now have the robot.