Fang Licheng comes home early and catches his wife, Xu Yuru, having an affair with her colleague, Shao Chunming. He takes out his treasured iron box and uncovers evidence that compensation funds were misappropriated and that his wife provided an unauthorized guarantee. Fang Licheng reports the matter to the disciplinary inspection commission and clears out all the valuables from their home. At a public meeting, he finally exposes the truth, brings corrupt section chief Zheng Guangfa to justice, and recovers the losses. He then divorces his wife and returns to a peaceful life.