Takkar, a hunter from the Wenja tribe, barely survives after his hunting party is ambushed and killed by a sabretooth cat as they travel to the land of Oros. Resigned to proceed alone, Takkar meets Sayla, a woman also from the Wenja, and once they arrive at Oros, Sayla informs Takkar that the Wenja are scattered and homeless across the land after their village was destroyed by Ull, leader of the Neanderthal-like Udam tribe who live in the northern mountains, who for some reason, hunt down the Wenja to cannibalize them.