In the prehistoric bicycle race put together by Millstone Rockerfella, Cliff Ace wants the first place prize, a Boulderdash Bike, so badly he can taste it. Cliff brings along his cave-babe, Roxy, for what is sure to be the race of their lifetime. They ride their dino-powered dirt bike through 32 fantastic heats, with amazing 3D graphics and a track full of prehistoric competitors.