The daughter of the Prince of Beiliang, Su Jin, hid her noble identity and married into the Prince Regent's Mansion of Daliang under the guise of a merchant's daughter for three years. She managed the household affairs with painstaking care, only to be publicly slapped and humiliated by her husband Xiao Yan. Heartbroken, she left a divorce letter and resolutely returned to Beiliang. As her true identity and talents are gradually revealed, Xiao Yan realizes his mistake and travels thousands of miles to Beiliang to win her back. After enduring national trials and emotional tug-of-war, the two finally reunite.