Namgoong Min plays Luo Yidi, an elite of the Emergency Medical Center of Taegang Hospital, with superb medical skills. He is a man full of human charm who does not care about social status and will never forget the fate of doctors and patients. Kim Byung-chul plays Shan Min-sik, the head of the prison medical department, who is a section chief with elite voter consciousness. His family's medical genealogy can be traced back to the generation of his deceased grandfather, and his father's three brothers are also doctors. Because of his parents' relationship, everyone thinks that he has already reserved a university professor position, but in fact it is not. Although he has a strong self-esteem, his strength cannot keep up and he always lags behind his peers. Quan Nara plays Han Sujin, who is the head of the gynecology department of the women's prison and is an internist and psychiatrist. Lively and cheerful, in order to find out the cause of his brother's death, he went to the psychiatric department of the prison hospital as a volunteer. The play tells the story of Dr. Luo Yidi, who removed the former medical director of the prison and became the new medical director, and then made a desperate effort to grow into a doctor who controls the board of directors of a prestigious university hospital. Directed by Hwang In Hyuk, the director of "Gentlemen of Wolsu Tailor Shop", and written by Seo Kwon Ki, the series is expected to be broadcast in March after "Why Mr. Bong Sang"