At the beginning of the plot, Ding committed suicide by swallowing medicine in the office. His death caused a sensation in the medical field, and all those who had problems with Ding passed the buck. Ding's son Ding and his apprentice Han Xilin rushed back to the Ninth Hospital after learning the news of his suicide. They all think there is something hidden in Ding's death. Dante and Han Xilin have a bad relationship and they don't want to cooperate.

Ding and Han Xilin studied medicine with Ding since childhood. Because Han Xilin is more talented than Ding, Ding often compares them, which leads to Ding's dissatisfaction with Ding and his bad relationship with Han Xilin. After that, Ding left his hometown and went to Sweden to become a doctor and a western doctor.

After his success, Han Xilin went to Inner Mongolia to cure diseases and save lives. After Ding's death, Han Xilin returned to the Ninth Hospital to inherit the mantle of the master. Everyone wants to know how Ding died. The hospital said that Ding had a history of depression for two years and committed suicide because of depression, but Han Xilin didn't think this was true.