On the day of her wedding, Jiang Wanqing, the legitimate daughter of the Marquis's household, is interrupted in the wedding hall by Lin Yan, a deputy general who barges in and produces her personal undergarment. Using a suspended-thread pulse diagnosis, Lin Yan falsely accuses her of being pregnant and marrying another man. Her fiancé, Pei Che, flies into a rage and repudiates her, while her biological father intends to have her drowned in a pond. Armed with memories of her previous life, Jiang Wanqing calmly fights back. In front of everyone, she exposes the truth: the diagnostic thread is tied to a wooden stool, and the imperial physician's medical evidence is fabricated. She then uncovers one conspiracy after another. Lin Yan is actually a woman and her father's illegitimate daughter, secretly involved with Pei Che and pregnant with his child. Pei Che has falsely claimed military achievements and embezzled soldiers' compensation, while her father has stolen a fortune and spent eighteen years plotting to replace Jiang Wanqing with his illegitimate daughter as the bride entering the General's household. With irrefutable evidence against them, all the villains are finally brought to justice.