Jin Hyuk, a brilliant neurosurgeon, was known for his cold and serious demeanor when working with his colleagues due to his pursuit of perfection. However, one day, he found himself mysteriously transported back 150 years in time. In this unfamiliar era, he began treating patients with limited medical resources and primitive medical knowledge. Determined to help those in need, Jin Hyuk had to search for new methods and techniques to save lives. Despite the challenges he faced, Jin Hyuk eventually became a true doctor, overcoming all obstacles.