There is a hospital, on the outskirts of Seoul. It is a psychiatric hospital, home to many patients. One of these patients, is Cho Kyuhyun. He has a rare mental disorder, extremely hard to treat. In fact, in most cases, it is incurable. As such, the hospitals two best doctors are assigned to his care, and only they are allowed to see him. The continuity of their care is key to the possibility of one day curing Kyuhyun of his madness.