College student Lin Ye returns to his hometown to take over an abandoned loach pond. From repairing pumps, clearing the pond, stabilizing the water body, to releasing and trial-raising fry, he successively encounters torrential rains, decaying leaf reflux, water quality fluctuations, cost pressures, uneven specifications, and equipment failures. Through persistent observation, troubleshooting, and small-step adjustments, he ultimately achieves graded shipment, while also transforming his father from questioning 'don't toss and turn' to actively cooperating. The story advances through authentic labor and operational choices, completing a dual closed-loop of father-son relationship and aquaculture process.