Sensing that Ko Seung-tak, a resident at Eunsang University Medical Center, will not get along with him, Cha Young-min, the top cardiothoracic surgeon, plans to get rid of him.

Young-min finds his body in a critical condition and soon discovers he can possess Seung-tak. Later, a man named Tes calls him a coma ghost.

Young-min suspects Seung-tak is one of the people responsible for his accident and Chairman Jang's condition. However, Seung-tak's sacrifice touches him greatly and he reconsiders his opinions.

Seung-tak struggles with an emergency patient. On the other hand, Young-min risks fading away as he takes his time investigating Chairman Jang's case.

Seung-tak has to ask for Young-min's help to save an emergency patient. Meanwhile, Young-min is surprised that Seung-tak can see him.

Young-min finds out the accident he was in was deliberate. Seung-jo asks Seung-tak to save him, but the only doctor who can help him is Young-min.