In the future, the Earth Coalition is fighting a losing war against the Glorft Imperium, a highly advanced extraterrestrial race with an insatiable hunger for conquest. Skilled 'mech pilot Kiva wants to send a robot named "Megas" back to a crucial part of the conflict, but accidentally sends it too far, and Megas winds up in the hands of couch potatoes Coop and Jamie. Worse, Kiva is stuck in the past with these boneheads, not to mention a Legion of really angry Glorft intent on capturing the Megas, even if they have to resort to using the giant UMD Mech to do it.