Boo Yong Joo was once a famous surgeon at the peak of his career at a major hospital. But he suddenly gives it all up one day to live in seclusion and work as a neighborhood doctor in a small town. He now goes by “Teacher Kim” and refers to himself as the “Romantic Doctor.” Meanwhile, Kang Dong Joo became a doctor to make something of himself after growing up poor, and he seeks out VIP patients to achieve the success that he desperately wants. Yoon Seo Jung is a passionate young surgeon who is haunted by a mistake from her past and tries to get over it. When Dong Joo and Seo Jung meet the quirky Teacher Kim, their lives and careers will never be the same again.

Shin Sol-i isn't shy about her unrequited crush on Cha Heon, her next-door neighbor. One day, she gets an idea to write him the perfect love letter.

Park Jae Won's first day of vacation starts with a spontaneous singalong in a sunlit van and ends with fireworks and Yoon Seon Ah by his side.