In her previous life, on her wedding day, Shen Mingtang believed the excuse that the measurements for her wedding dress had been mixed up. Drugged by her parents and forced to leave her fingerprint on forged documents, she was made to marry into the Earl of Ningyuan's household in place of her elder sister. In the end, she died of illness after enduring humiliation. Given a second chance at life, she invites the Empress Dowager to witness her wedding in advance and refuses to wear an ordinary wedding dress without a name tag. She carefully investigates the measurements of the imperial wedding gown, the official clothing records, and the forged documents. Her parents and elder sister use family affection and social status to pressure her into giving in, but she insists on expressing her own wishes about her marriage. With the support of the Empress Dowager, female court officials, maids, and Crown Prince Xiao Jingheng, the marriage-swapping conspiracy is exposed. Shen Mingtang reclaims her betrothal, puts on the wedding dress that truly belongs to her, and enters the Eastern Palace with dignity.