Single mother Tan Jing and her son Sun Ping, who suffers from congenital heart disease, depend on each other for life. In order to save money for her son's surgery, Tan Jing works hard and lives frugally. Although life is hard, Tan Jing has no resentment or dissatisfaction. She is still independent and strong, cherishes her ordinary life, and also educates Sun Ping to be sensible and lovely. Nie Yusheng is a cardiac surgeon who is preparing a surgical CM project to help children with congenital heart disease. He selected Sun Ping as the first beneficiary. When seeking medical treatment, Nie Yusheng discovered that the mother of the child was Tan Jing, his lover seven years ago. During the treatment, Nie Yusheng was still deeply attracted by the beauty of tenacity and courage accumulated in Tan Jing, and was also moved by Sun Ping's cuteness and understanding. Life and time have tested both parties and allowed them to face each other's love more maturely. In the end, Sun Ping was successfully treated, Tan Jing had her own career, Nie Yusheng's CM project was successfully promoted, and they finally ushered in a happy and satisfactory result.