Throttle, Modo and Vinnie...The Biker Mice from Mars...escape their planet as it it devastated by the fish faced plutarkians. Crashlanding in Chicago, the renegade rodents soon discover the Plutarkians next target: EARTH. Led by his supreme chessiness, Lawrence Limburger, and his devilish cohorts, Greasepit and the fiendish Dr. Karbunkle, the Plutarkians are already undermining the Windy City. It's tail whippin' time 'cause the baddest motorcycle mammajammers in the universe are riding to the rescue.