YN makes a deal with the devil for the life she always dreamed of, but what she didn't expect was that the devil decided to take the shape of a beautiful woman. Not only that, but the devil decides to try her, giving YN a year to show she can have the life she wants, fame and riches, without letting them corrupt her soul, and if she succeeds, the devil will let her keep her soul. But what neither of them expect is that living together for that year, getting to know the other like either of them had ever experienced, would eventually lead to dangerous feelings blossoming.