Kim Sabu (Han Suk-Kyu) calls himself Dr. Romantic and is called Teacher Kim. He is a weird doctor who does not want to socialize with others. Kim Sabu runs the shabby clinic Doldam. Cha Eun-Jae (Lee Sung-Kyung) is a 2nd year fellow for surgery. She is smart and confident. She has never experienced discouragement or failure. Seo Woo-Jin (Ahn Hyo-Seop) is a 2nd year fellow for surgery. He has excellent skills for surgery. His personality is cynical. Because he went through a tough life, he does not believe in happiness. Cha Eun-Jae and Seo Woo-Jin meet the unusual doctor Teacher Kim. They grow as humans and doctors with their experience with Teacher Kim.