Department Head Min (Jung Joonho) works for a large corporation. He is married, but is attracted to Chae SongHa (Yum Jungah), who lives downstairs from him. Songha works as a marketing team leader at an advertising company. She is a perfectionist and wants things perfect at home and work. Although she has a doctor as a husband, who's envied by others around her, her life isn't filled with joy...