On the prehistoric continent after the glacier receded, a primitive tribe called "Yanya" is struggling on the edge of survival - the "Ice Wolf Tribe" in the north covets their warm river valley, and giant anaconda snakes that spit venom lurk deep in the forest, and an upcoming drought is gradually making their prey extinct. "Shi", the youngest hunter in the tribe, was considered "unlucky" because he was born lame. However, during an exile, he accidentally discovered a "living fire" that could burn stably (the prototype of the primitive technology of drilling wood to make fire). When the Ice Wolf Clan's surprise attack and natural disaster strike at the same time, Shi must convince the conservative tribesmen to come out of the cave with him, use rough stone tools to split the thorns, and use weak fire to ignite the first glimmer of civilization. This is an epic about survival, prejudice and breakthrough. Every step is on the edge of life and death, and every choice determines the survival of the tribe.