On the day of Li An's coming-of-age ceremony, his sister brought back the orphan Wen Qitian. His arrival caused a breakdown in the relationship between Li An and his sister, and Li An was kicked out of the house. Heartbroken, Li An participated in ten years of closed medical research. During this period, he tried to say goodbye but was rejected. His sister took Wen Qitian to Norway, which he longed for. After many years of successful research, Li An let go of the past and drifted away from his sister. The sister regretted it later, and eventually Li Lan died of illness. Li An said goodbye to her and started a new life.
