Huo Zhi, who grew up in an orphanage, happens to save the rich heir Jiang Cun when he gets into a car accident. Jiang Cun falls in love at first sight with his savior and tries to pursue her. However, he mistakenly pursues her twin sister Qin Ying Su instead. When Huo Zhi and Ying Su meet and recognize each other, Ying Su pleads her sister to pretend to be her for a while, so that she can treat an illness in secret. Huo Zhi agrees and enters the Jiang household, however, an accident happens and she loses her memory. Thereupon, Huo Zhi turns into her old naive and simple self. Jiang Cun is happy about her character change and becomes more considerate and loving towards his wife, but what will happen when he discovers the secret?