Four time Piston Cup winner Lightning McQueen is strongarmed into entering the World Grand Prix by his best friend Mater, against the reigning champion Francesco. The race is unique in that all cars are running on Allinol, an alternative fuel that is 100% natural. However, cars running on Allinol are mysteriously breaking down mid-race. Secret agent Finn McMissile is sent in to investigate, along with rookie agent Holly Shiftwell. When their contact is forced to hide his information, he picks the most unlikely hiding spot: To-Mater.