Lin Yue, a graduate student in science and engineering, transmigrates to the Neolithic Age during a thunderstorm. Armed with modern knowledge and crude tools, he fights for survival in a primeval forest surrounded by mammoths and saber-toothed tigers. He makes stone tools, builds shelters, and purifies water. After encountering the Rock Tribe, he uses his medical knowledge to overcome an epidemic, improves their stone tools with heat treatment, and teaches them to make bows and arrows, farm, and tame wild animals, gradually breaking down the barriers between them.
Faced with a shaman's doubts about his “unusual methods” and the Blacktooth Tribe's attempts to seize their resources, Lin Yue leads his people in smelting iron ore, making iron tools, and forming a tribal alliance to fight off their enemies. From guiding a primitive tribe toward an agricultural civilization to exploring mysterious rocks in search of a way back to his own time, he writes a thrilling tale of a modern man in the prehistoric world, all while facing the difficult choice of staying to build a civilization or returning to the modern age.
