Sandara Park was happily working as the personal assistant of Kwon Hyunsang, the owner and CEO of Kwon Corporation, when he suddenly died of heart failure. Grief-stricken over the loss of her boss, who was like a father to her, Sandaraa was left to deal with Hyunsang's dashing estranged son, Jiyong. She can't stand Jiyong, and he doesn't seem to trust her. But they eventually develop a mutual respect that turns into an intense attraction to each other. Is a long-term romance possible? Or, is it too much for them to handle on top of the pressure from work and their personal lives?