Sung Hoon Ma, heir to the Ma Yoon Group, is a wealthy and talented man known for his good looks. However, due to past trauma, he despises women and surrounds himself only with male staff. To counter rumors about his sexuality, Deok Sim Kang is hired to act as his secretary. She disguises herself as an old-fashioned, middle-aged woman, hiding her youthful beauty, with a reward of one billion won and the chance to see Sung Hoon daily. Initially repulsed by her, Sung Hoon begins to develop feelings for Deok Sim, especially when she expresses disinterest in him.
