I died as a respected professor of anthropology, and woke up in the body of an unnamed young man in the middle of a tundra steppe, surrounded by cave hyenas. All around me is a harsh primitive world of the last Ice Age. And in my head—every future chapter in the history of humankind: its breakthroughs, its dead ends.
But no matter what knowledge I have, here the spear and instinct rule. And to make them listen, I must first earn a place by the fire. Only then will I be able to begin my true work: step by step, without anyone noticing, I will change the path of an entire species.