Nam woohyun is a nurse in the psychiatric department. People call him the permanent resident of the 'looney' department. But he doesn't care. Not when that is the only place where he can see his favorite smile, and of course, protecting it under his care.

A story of a person who was born different, and how being different can also bring happiness to the world. All that person need is just another person, to understand and believe in him, in a way other people can't.