Young lead dancer Yunnan Xing was introduced by her mother to Ma Yanchen, a talented doctor from the Institute of Neurological Medicine. Just because they were old enough to get married, the two got married. After going through various experiences, the two became close friends from strangers, and gradually fell in love with each other. When the ambiguous feelings were at their strongest, Yunnan Xingcha When she was diagnosed with brain cancer, Ma Yanchen persisted and even wanted to rely on his position to save her life. However, fate played a trick on her and Yunnan Xing's disease could not be cured. The two of them worked together to fulfill her last three wishes... Many years later, after Ma Yanchen developed a special treatment for his deceased wife's similar disease, she followed the sunset...