Doctor K is a doctor with exceptional skill. Graduated from a top-tier, high profile medical college, instead of working in a hospital or running his own clinic, he prefers to live his life wandering around to treat people in needs of help.

Being observant, this make K diagnosis the patient symptom quickly. However, his outstanding skill that always leave the other doctor in awe is his surgery skill-the way he uses his knife is extremely quick and precise. His patient comes from all walk of live, from an ordinary young kids who is a nobody that don't know who K is to a high profile people who have heard about his skill and needs him for his medical skills.