Modern extreme wild-fishing master Lin Du accidentally crosses over, arriving at a harsh ancient exile camp. Relying on rich fishing, physics, and engineering knowledge, he gathers materials on site, cleverly uses natural conditions to catch fish, and resolves the camp's food dilemma. He leads everyone to study tools, develop fisheries, carry out barter trade, and build the camp. When encountering geological hazards, he uses professional wisdom to defuse crises, leading the people to rely on themselves, building a border market town where people live and work in peace and contentment, and living out a different kind of life.