Venjix, an evil and rapidly evolving computer virus, has ravaged Earth with an army of Grinder droids and enslaved the remaining humans. Only the city of Corinth remains, protected by a nearly impenetrable force field from the poisonous atmosphere of the wasteland beyond. To fight Venjix's advancing evil, the mysterious Doctor K creates the "RPM Power Rangers" and recruits Scott, Flynn, Summer and Ziggy to operate the advanced weapons, vehicles and equipment. As a team, they try to stop the attacking machine army bent on world domination.