Xu Wu, Chief Physician of Cardiology, and Tristan Sterling, Deputy Director of Cardiac Surgery, enter a flash marriage, agreeing to a secret marriage until her promotion. They support each other, growing affection from their contractual relationship. Faced with her stepbrother's entanglement and workplace disputes, Tristan defends Xu Wu, and they go public. They achieve mutual growth while treating patients, moving hand in hand to a free future.