Geological explorer Lin Ye accidentally falls into a prehistoric world five million years ago, waking up to find himself a young ape hunted by hyenas. Facing threats of drought, hunger, giant crocodiles, saber-toothed cats, and a strange ape troop, he relies on the "Civilization Spark System" and modern knowledge, starting from making the first digging stick, to finding groundwater, making stone tools, building a thorn camp, and preserving fire, saving Hui Mu, Bai Er, Xiao Shi, and Duan Ya through repeated life-or-death crises. As the tribe continues to grow, Lin Ye must not only defeat beasts and the strong enemy Chi Zong, but also establish rules for guards, division of labor, and food distribution, making a group of apes that only know instinctive survival learn to use tools.