Story about Boo Yong-joo (Han Suk-kyu) a genius and triple-board certified surgeon, who was once at the top of his field and used to work at Seoul’s top hospital, Geodae. After a traumatic incident, he disappears and changes his name to Kim Sa-bu to work at a small hospital named Doldam, which is located at Gangwon Province. He guides Kang Dong-joo (Yoo Yeon-seok) and Yoon Seo-jeong (Seo Hyun-jin) to become great doctors there, teaches them to fight against power and money for the sake of patients.
Kim Sa-bu or Teacher Kim, his real name is actually Boo Yong-joo. He is the only genius surgeon in Korea who achieved triple-board certified in General surgery, Cardiac surgery and Neurosurgery. After the death of his junior in Geodae hospital, he isolated himself and moved to Doldam hospital to become the Chief Surgeon there.
Kang Dong-joo is an intelligent doctor. Armed with excellent skills, he has strong desire to succeed, but he doesn’t have a guarantee because of his poor family background. He got transferred to Doldam hospital due a surgery on a VIP failed, which was an opportunity for him to excel.
Yoon Seo-jung is another doctor with a strong desire to be recognized more than anyone. She got swayed by Dong-joo’s romantic confession and felt guilty after the death of her boyfriend. She disappeared from Geodae hospital, and got rescued by Kim Sa-bu after hurting herself. She then became a doctor at Doldam hospital.