Jin Hyuk is a very talented doctor, born into a family of doctors. He is also self-assured, because he knows he is the only neurosurgeon capable of analyzing and handling any situation in a short amount of time. He always succeeds. For this reason, he cannot accept others’ shortcomings. Jin Hyuk is engaged to Yoo Mi Na. One day, Jin Hyuk finds himself transported to the Joseon era. Having traveled back in time 150 years, he witnesses medical techniques in their infancy and learns what it means to be a true doctor. In the past, he is helped by Lee Ha Eung, a kind-hearted older man, and meets Hong Young Rae, a lively and kind young woman from a fallen noble family who is the spitting image of his fiancée. However, she is the future bride of Kim Kyung Tak, the serious chief of the Joseon police and the illegitimate son of an ambitious politician.