Chen Jianguo, a young man from modern times, returns to a rural village in the 1980s and discovers that the crayfish in the fields are considered pests. Despite the ridicule of his neighbors, he takes a chance by buying crayfish at low cost and turning them into a distinctive delicacy that opens up a market with local restaurants. He cleverly overcomes interference from local thugs and seafood traders, experiments with eco-friendly farming methods such as rice-crayfish co-culture and raising crayfish with distiller's grains, and establishes a local aquatic products brand. He builds village roads and opens a canned-food processing factory, helping farmers throughout the village steadily increase their incomes. By upholding honest business practices and relying on hard work and long-term vision, he leads his fellow villagers toward prosperity through specialized farming and aquaculture.