Echo Films.

Kassie, a smart, fun-loving single woman, despite her neurotic best friend Wally's objections, decides it's time to have a baby, even if it means doing it herself, with a little help from a charming sperm donor. But, unbeknownst to her, Kassie's plans go awry because of a last-minute switch that isn't discovered until seven years later, when Wally gets acquainted with Kassie's cute, though slightly neurotic, son.

Over 5300 years ago, a Neolithic clan settled near a creek. While their leader Kelab is hunting, the settlement is attacked, and the tribe is brutally murdered, amongst them Kelab's wife and son. His infant son is missing. He sets out after the murderers on what turns into a grand odyssey where he must fight constantly, for the infant's survival; against the forces of nature; against hunters; the loneliness of the quest, and the growing sense of doubt...