Overview: An emergency arises in the hospital, but when Eun Sub sees bloody patients coming in, he runs away to the rooftop and has a hard time. Jung Eun drags Eun Sub impatiently and says he should not hide when patients like his brother are dying. Eun Sub reluctantly heads to the emergency room and sees a patient vomiting blood in his mouth while he is forced to treat the patient. Eun Sub accurately identifies the patient's condition and saves the patient from an urgent crisis.