In order to save his seriously ill mother, Gu Yanzhou became the substitute boyfriend of Su Qinghan, the eldest daughter of the Su family. When Bai Yueguang thanked Chang'an for returning, Su Qinghan unexpectedly became pregnant with his child. At the cocktail party, she was humiliated in public, but Gu Yanzhou stepped forward resolutely, took up the responsibility and promised to protect her. This encounter, which began with a transaction, ended with mutual support and sincere treatment, leading to a plain, warm, lifelong happiness.
