During the Daqing period, loyal and martial General Gu Yunxiao returned home in triumph, and due to a misunderstanding, sought to divorce his legal wife Zhao Wu and keep their only son Zhao Xun. Eighteen-year-old Zhao Xun valued righteousness and followed his mother in public. According to the law, mother and son divorced and changed their household registration, moving to Pingsang to stand on their own. Zhao Wu managed the household, Zhao Xun resolved to study diligently, and County Magistrate Cui Ming secretly protected them. Faced with framed charges by villains, mother and son argued logically and forcefully, ultimately bringing the villains to justice. Later, Zhao Xun achieved success in the imperial examinations, Gu Yunxiao came to his senses, and the family let go of past grievances and reconciled. It praises the virtues of filial piety, cherishing family, self-improvement, and abiding by the law with reason.