Comedy directed by and starring Adam Rifkin as a caveman who yearns for something more than the life of a simple tribesman. Ishbo (Rifkin) may not be the sharpest rock in the cave, but he has aspirations beyond the life of hunting, eating and lazing enjoyed by his father (David Carradine) and brother, Thudnik (Hayes MacArthur). Ishbo's love for inventions and refusal to club women set him apart from the rest of the tribe. Unfortunately for Ishbo, they fail to win him the heart of Fardart (Ali Larter), who is set to marry his sexist, uninventive brother. Is there any way Ishbo can capture the love of Fardart and convince the tribe to make an effort to expand their minds?