Jung Da-Eun (Park Bo-Young) works as a nurse. She is transferred to neuropsychiatry from the internal medicine department. This is her first time working in neuropsychiatry, so everything is difficult and awkward for her. Nevertheless, Jung Da-Eun tries her best to deal with the patients and she grows as a nurse with the help of Chief Nurse Song Hyo-Jin (Lee Jung-Eun). Dong Go-Yoon (Yeon Woo-Jin) works as a doctor and specializes in proctology. Watching Nurse Jung Da-Eun and her pure ways, Dong Go-Yoon realizes that he smiles when seeing her and is even healed by her. Meanwhile, Jung Da-Eun is friends with Song Yoo-Chan (Jang Dong-Yoon). He looks like a very bright person, but he holds pain inside that nobody knows about. Synopsis by AsianWiki