Two cutting-edge scientists give 'birth' to a Neanderthal—the first to walk the earth for some 35,000 years—in order to attempt to answer these questions. Part 'normal' child, part science experiment, William’s 'parents' struggle with the best way to raise him. As William grows toward adulthood, he is educated in the human experiences of love and intimacy. But his primitive impulses begin to emerge the more he tries to conform to human expectations, leading to tragic consequences for him and his loved ones.

He-Man, legendary defender of the planet Eternia, has been summoned to the futuristic planet of Primus to defend the planet from the evil Mutants of the neighboring planet of Denebria. But his old adversary Skeletor has followed him and allied himself with the Mutants in his fight to conquer the whole universe. Together with a team of Galactic Guardians, He-Man fights to defend Primus and all its power resources from the continuous attacks by Skeletor and the Mutants.