Contractor Chen Lei returned to his hometown to build houses for the villagers, adhering to high standards for materials and construction techniques, but was ostracized by his cousin Wang Guixiang, who led a crowd to force down prices. He turned instead to undertake a public welfare project in the town, winning official recognition through his superior quality. The villagers, greedy for low prices, chose an unqualified contractor, and their houses turned into dangerous dwellings after a heavy rainstorm, leaving everyone full of regret. After experiencing the lesson, Wang Guixiang and her son sincerely repented. Chen Lei let go of past grudges to teach the craft of house building, joining hands to lead the villagers in rebuilding their homes. The malicious and troublemaking illegal contractor was punished according to the law, showing the simple truth that one must first keep to their original moral principles in life.