As the second daughter of the affluent Daeju Group family, Yoon Seung-ah should have a perfect life of luxury. However, the dismal truth is that she has experienced nothing but contempt and restriction simply for being an illegitimate child. Then, one day, in a strange twist of events, Seung-ah meets Ki Taejun from the KCT Group, who wants to strike up a deal in exchange for helping her regain her freedom and sense of self. And for the first time, she decides to give in to her impulses which sets in motion an array of complications and desires…