[Healing + mutual devotion + reaching the top together* + slice of life] On her way home, ordinary office worker Li Zhiyu rescues Gu Mobai in a dark alley. He has been ambushed by family rivals and is seriously injured. After she cares for him for several days, his condition improves, and he unexpectedly proposes to her. Li Zhiyu firmly turns him down, assuming it's a joke.
Her peaceful life doesn't last long. Her grandmother suddenly falls gravely ill, and Li Zhiyu tries everywhere to raise the exorbitant surgery fees, but comes up empty. Gu Mobai reappears, and to save her grandmother, Li Zhiyu reluctantly accepts his absurd proposal, beginning a marriage of convenience.
After the wedding, Gu Mobai admits that he wants her to act as a shield against his family's matchmaking attempts, and Li Zhiyu agrees. But Gu Mobai's childhood friend, He Weifei, grows jealous over her love for him and comes to Li Zhiyu's workplace to humiliate her. Gu Mobai steps in to defend his wife and warns He Weifei, only to provoke her into a frenzied revenge. Li Zhiyu is kidnapped and badly injured.
At the hospital, Gu Mobai happens to notice Li Zhiyu's unusual birthmark. Memories surface of a child lost by his family many years ago, and he begins investigating. Can a marriage that began as a transaction find its way to true happiness amid countless trials and a shocking revelation?
