Lee Si Chan is a brilliant but emotionally detached surgeon whose life takes a dramatic turn after he is suspected of being involved in a suicide. Abandoning everything, he begins working in psychiatry, where he slowly starts to open up and confront the emotional barriers he has long kept locked away. Despite his appealing appearance, he has a difficult and abrasive personality. Once a troublemaking intern, he gradually grows into a psychiatry resident and, ultimately, a true “mind doctor”.