From her looks to her background, everything about Mia seems so ordinary. But then she lands a job as the secretary of Siwoo Lee, a former model who is now a director at Taeyang Group, a conglomerate he is set to inherit. Siwoo is a notorious playboy and Mia finds out that she only got the job because she was the farthest thing from his type. But as they work together, she proves to be very capable and always seems to be there when he needs her the most. But when their professional relationship begins to turn into a heart-pounding romance, Mia is faced with a life-altering situation.