Karr was born as a Neanderthal. He was not too smart and lives in an extreme environment. He used to be a famous adventurer in his previous modern life and now use His knowledge to survive the ice age era. Could he adapted living as a caveman and face off against beasts like sabertooth tigers, mammoths and wild wolves? Could he carry out the mission given by God? namely preventing the extinction of Neanderthals? The story is slow-paced but action-packed set in the realistic life of prehistoric cavemen.