Su Wan is a Cinderella who carries goods at the dock. In order to save her seriously ill mother, she signed a three-month contract and became the "fiancée" of Gu Yanci, the son of the Gu family. In the eyes of outsiders, he is the proud man who can do all the decathlons, but privately he can't even button a button; I look innocent and weak, but in fact I can carry rice bags and repair water pipes. During the contract period, he helped me save my mother, and I dealt with the family for him. I thought it was just a deal, but we got to know each other day and night and fell in love. But his old flame returns with twisted possessiveness, and family expectations and personal ambitions engulf us again. Is this love that started from a contract sweet or cruel? All I know is that I want to protect my "wasteful" son, as well as our precarious happiness.