After time-traveling to primitive society, Lu Feng, a special forces soldier, uses his modern knowledge to lead a weak tribe from struggling to find enough food to enjoying abundant food and clothing. He teaches his people how to make fire, roast meat, grow vegetables, raise pigs, build houses, and fire bricks. Through his strength and wisdom, he wins over other tribes, forges alliances, and grows his community, ultimately building Fist City. The story celebrates unity, perseverance, and self-reliance, conveying the heartwarming message that a better life can be created with our own hands.