Seo Won, who works as a vice president's secretary is disguised as a male secretary on behalf of her younger brother who has been in an accident, becomes mistaken as a corporate spy immediately and has to work alone to remove the suspicions of her as a spy… “Don't meet that woman. Other women too” “What kind of unreasonable demand is that?!” Is…is this social life? While busy with finding out the spy, she becomes entangled with the vice-president, Kang Jun, who knows her as a man and shows interest in her, and the smiling director who meets with Kang Jun frequently, Dong Jin. In this situation, can Seo Won remove suspicions of her as a spy and hide her gender?