A wimp (Ringo Starr) bops a dinosaur and lusts for a cavegirl (Barbara Bach).
Atouk (Ringo Starr) is the leader of a small band of misfit cavemen who are part of a larger community headed by strongman Tonda (John Matuszak). Atouk is madly in love with Tonda's woman, Lana (Barbara Bach). He even ignores the advances of the lovely Tala (Shelley Long) and sets his mind to finding some way of wooing Lana. During Atouk's quest for romance, he and his cohorts fend off dinosaurs, indulge in hallucinogens and invent cooking, music and medicine.