In her previous life, Ye Wantang, the legitimate daughter of the Ye family, was disgraced on her wedding night when Ning Yao, her fiancé Gu Jinxing's deputy general, disguised herself as a man and caused a scandal. The Gu family sided with their trusted subordinate and, together with Gu's widowed sister-in-law, Su Niang, used her reputation and chastity to threaten her, leaving her to die with her grievances unresolved. When she opens her eyes again, she has returned to her wedding day. This time, Ye Wantang calmly sets her plans in motion and exposes the conspiracy in front of everyone. Her elder brother arrives to defend her, denounces the Gu family's favoritism and injustice, and resolutely calls off the engagement, taking her dowry back home. After marrying into the Gu family, Ning Yao becomes embroiled in a bitter rivalry with Su Niang. Gu Jinxing's biased conduct eventually catches up with him when his fraudulent military achievements and embezzlement of soldiers' pay are exposed. He is stripped of his position and exiled, while Su Niang spends the rest of her life alone. Ye Wantang uses her dowry to establish a school for girls, teaching them to read, master various skills, and become independent and self-reliant. In the end, she earns everyone's respect as Teacher Ye.