In a primitive world teeming with dangers, a mysterious warrior named Yor roams the rugged landscapes. Clad in animal pelts and wielding a powerful axe, Yor saves a village woman, Ka-Laa, and her guardian Pag from a dinosaur attack. Intrigued by a golden medallion he carries, Ka-Laa joins Yor on his quest to uncover his origins. They journey through prehistoric terrains, facing off against hostile tribes, formidable beasts, and other perils. Yor's bravery and combat prowess help them survive these relentless challenges as they strive to unravel his past.

As their adventure unfolds, Yor encounters artifacts and signs hinting at a forgotten civilization with advanced technology. The trio's path leads them to a series of shocking discoveries that challenge their understanding of the world they inhabit. Dark secrets begin to surface, exposing a complex history interwoven with the remnants of an ancient society. The journey grows increasingly perilous, steering them towards a climactic revelation that could alter the fate of their world.