Olivia, a small-town girl, moves to New York alone to build a life for herself. She chances upon John, a wealthy elderly man suffering from heatstroke, and comes to his rescue. Desperate to raise 100,000 dollars for her father’s surgery, she accepts John’s proposal and enters a hasty flash marriage with his grandson Oliver, the CEO of a top-tier corporate group. The two agree to keep their marriage hidden from the public. Concealing her true identity, Olivia works as a cleaner at her husband’s company, where she is repeatedly humiliated and tormented by Laura, a senior executive infatuated with Oliver, and her associates. As they grow closer, Oliver has long since fallen in love with her. He also discovers that the girl who saved his life in a car accident three years ago is none other than Olivia. At a grand high-society banquet, Laura conspires with Oliver’s stepmother to frame Olivia’s mother, who works as a cleaner. . Oliver publicly confirms their marriage, brings the wrongdoers to justice, and drops to one knee to formally propose to Olivia.