Jung Da Eun 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.

Dong Go Yoon 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. He looks like a very bright person, but he holds pain inside that nobody knows about.