Yubin is a 29 year old woman. She has a great career but not an equally great life. She's stuck in a toxic and abusive relationship and to escape that, she puts everything she has in her work. After years of abuse she's a totally different woman than she was before, turning friends and family away. Her life changes when she meets Handong. Minji, Yubin's best friend and the company's financial manager, hires the Chinese girl as Yubin's personal assistant. Handong is a 30 year old Chinese woman with a terrible past. But unlike Yubin, her past hasn't changed her. She's a very social and bubbly woman and she will try to survive being the personal assistant of the feared big boss.