The story takes place during the Yongle period of the Ming Dynasty. Jiang Xiaoxuan (Gong Mi), the beloved daughter of Jiang Ge Lao, violated the will of the Queen Mother and was unwilling to marry Jin Yuanbao (Wallace Huo), the son of the Jin Mansion. She fled on the occasion of the wedding. The chivalrous woman Yu Qilin (Tang Yan) came to investigate the true identity of Jin Yuanbao, but by mistake, she married into the Jin Mansion on behalf of Jiang Xiaoxuan. Because she grew up in the mountains and her temperament was incompatible with the aristocratic family, Yu Qilin made a lot of jokes, but her true nature also captured the heart of the fake husband Jin Yuanbao. Liu Wenzhao (Wang Yang), the nephew of Mrs. Jin (Vivian Wu), admired Yu Qilin's integrity and frankness, but because he was frightened by the Queen Mother's marriage, he could only secretly hinder her. Jiang Xiaoxuan, who had escaped from marriage, was accidentally rescued from the hands of the villain by Gu Changfeng (Huang Ming), the doctor of the Jin Mansion. She moved into the Jin Mansion by mistake under the pseudonym Xue'er and fell in love with Changfeng. The secret of the proxy marriage makes Yu Qilin and Jiang Xiaoxuan walk on thin ice in the Jin Mansion. The mystery of Jin Yuanbao's life experience is also about to be revealed. Is this a predestined marriage or a malicious joke of fate?