Fish farmer Chen Jingyuan has prepared 500,000 yuan to buy a house for his son. But with the flood season approaching, he invests every last penny in flood-proof renovations for his fish ponds instead. His in-law, Liu Fusheng, publicly mocks him, while his son and daughter-in-law threaten to cut ties with him. The entire village fails to understand his decision, and only the village chief secretly supports him. When an unprecedented torrential downpour strikes, Chen's renovated fish ponds remain completely unharmed, earning him 5.7 million yuan from selling his mandarin fish. Meanwhile, every pond belonging to Liu Fusheng, who refused to make improvements, is destroyed. Putting past grievances aside, Chen establishes an aquaculture cooperative, promotes scientific fish farming, and helps villagers increase their incomes. Three years later, Liu Fusheng falls on hard times and comes begging for help. Chen's son finally realizes his mistakes and returns home to reconcile with his father. Chen also meets Li Enjing and finds warmth and companionship in his later years. One torrential rainstorm reveals the true nature of everyone's hearts.