Xu Wu, a cardiologist, enters a flash marriage to escape her toxic original family, only to realize she married the wrong person—he is actually Song Tingxi, the newly parachuted head of cardiac surgery. To protect their career promotions, the two agree to a secret marriage, acting like strangers at the office and husband and wife at home. Moving from rational cooperation to genuine romance, they weather exposure crises, family ruptures, and career advancements, ultimately resulting in a marriage proposal on Mount Everest, a vast and boundless world, flying wing to wing with her beloved.