Pressured by his family to marry and have a grandson, demolition resident Chen Dafa enters into a contract marriage with Lin Qinghan, a fallen and debt-ridden famous socialite, promising to pay off her debts for her. After marriage, he secretly provides funds to help Lin Qinghan found Qihang Technology. After the child is born, Chen Dafa feels guilty and leaves alone with the baby to set up a street stall for five years. When Lin Qinghan builds a 5 billion commercial empire, she tracks down the father and son and deliberately makes things difficult for him under the guise of a personal assistant. As the two spend day and night together, their romance reignites. Chen Dafa reveals his hidden tycoon identity, defeats his enemy Shen Mo, resolves the company's crisis, beats back rivals in love, unravels all conflicts, holds a makeup wedding, and finally the family of three lives happily together.