The female lead, Su Qingyan, is an intensive care nurse. As a teenager, she fell in love with Jiang Yanzhi, a frail, brilliant boy, but their families forcibly separated them. Years later, the hospital admits a critically ill patient, and he turns out to be her first love, whom she hasn't seen in twelve years. He is a top architectural designer specializing in ancient buildings, with a hereditary heart and lung condition that leaves his life hanging by a thread. He also has an adopted younger sister who has been by his side for years and is deeply attached to him. Old misunderstandings, family opposition, and the fear of death all come rushing back. The heroine has witnessed countless lives and deaths, and knows clearly what choosing him will entail. This is not a mindless sweet romance: there is tension and pain, and the two save each other.
