Jiang Yebai is reborn three days before his engagement, only to discover that his beloved Su Wanli from his previous life had long been having an affair with his younger brother Jiang Yuchuan. He resolutely calls off the engagement and instead marries Lu Tangying, the woman everyone mocks as a "foolish nanny." Little does he know, Lu Tangying is actually a wealthy heiress from the capital, pretending to be naive to stay by his side to repay a kindness.The two join hands to uncover the truths: the stolen love letters, the imposture in the guzheng performance, and more. In the end, true love prevails, and they become a couple. As for Su Wanli, she mistakenly fell for a scoundrel, ends up betrayed by everyone, and loses her true love forever.
