A flight attendant, unable to bear her family urging her to marry, impulsively enters into a flash marriage with a community security guard, setting up an agreement to start a nominal marriage. As they spend days and nights together, he displays outstanding culinary skills and protects her in every way, causing the two to gradually develop feelings for each other. However, he acts mysteriously, hiding many hidden details. In reality, he is a corporate power holder. Women who admire him appear one after another, continuously provoking and driving wedges. When his identity is accidentally revealed, the female lead finds it hard to accept this concealment, and the two fall into an emotional predicament.