On the eve of her wedding, Song Zhi, the heiress of the Song family, discovers that her fiancé, Gu Chongen, has run away from the wedding for his first love, Bai Yueguang, and has even arranged for his twin brother, Gu Chongming, to take his place. Playing along with the deception, she marries Gu Chongming. After the wedding, as they test each other and navigate their complicated relationship, she gradually realizes that Gu Chongming has long been deeply in love with her. When Gu Chongen finally comes to his senses, his attempts to win her back fail. He joins forces with his calculating ex-girlfriend, Lin Manman, to deliberately sabotage their relationship, but ultimately lands in prison for embezzling company funds. After Song Zhi and Gu Chongming weather identity-related intrigues and challenges from their families and careers, they finally choose each other wholeheartedly and find a happy ending in love.