Brothers K.C. and Trip Carlyle are talented supercross racers who are fiercely competitive with each other. Things get heated when K.C. is offered an exclusive sponsorship deal while Trip is left in the background. But, when the latter is tragically disabled after a racing accident, the brothers manage to set aside their differences. Trip begins coaching K.C. and helps him work his way into a race featuring the world's best riders, with a huge cash prize.