The Liu family's fish pond in Qinghe Town is about to open for weighing and sales, yet Xu Chuan, the live-in son-in-law, spends every day sitting by the pond fishing. His mother-in-law, relatives, and neighbors all mock him as a good-for-nothing. From oxygen shortages in the pond and competition for market stalls to a disastrous fish banquet, a fish-fry scam, and price manipulation at a fish-farm contract meeting, one everyday problem after another pushes the Liu family into the spotlight. Xu Chuan relies neither on deep pockets nor ruthless tactics. With his ability to read ripples, understand fish, and deal with people, he repeatedly makes those who looked down on him change their tune on the spot. His wife, Liu Shuyi, goes from disappointment to concern, while his mother-in-law goes from disapproval to fiercely defending him. In the end, the whole family turns their small fish pond into a celebrated local specialty shared by the entire village, gaining both business success and a heartwarming family reunion.