Lin Chen, a modern aquaculture engineer, falls into the water while working overtime and travels through time to the impoverished Linhe Village of the Great Yong Dynasty. He becomes a useless young man whose parents are both deceased, who owes a loan sharking landlord money, and who is ridiculed by the entire village. His cousin occupies the riverbank, the landlord blocks the river and cuts off the villagers' livelihood, and the fishing boss monopolizes the fish market. But with his modern bait-formulation techniques, layered aquaculture methods, and traditional ecological fishpond techniques, Lin Chen starts with nothing but a broken fishing rod and fishes his way to ten miles of prosperity. By improving fishing methods, he leads the entire village to wealth, breaks the fishing boss's monopoly, submits a river dredging proposal, and ultimately establishes a royal tribute fish base. With modern knowledge and kindness, one man changes the fate of an entire region. A heartwarming ending with positive values.