Everything about Mia screams ordinary, from her appearance to her background and her education. However, she is able to get a job as the secretary of Lee Siwoo, the heir of Taeyang Group. He’s used to be a model and now he works as the director at his family company. Later, Mia finds out the reason why she’s able to get this job is due to the director’s standard. Siwoo is a playboy and she is chosen because she is the farthest from his ideal type. As they work with each other, the director finds out that Mia is indeed very diligent and is always for him in needed time. But just when their relationship begins to take a turn, Mia has to deal with a serious situation.