Let's say there were 2 girls who could pass for twins...

One was filthy rich and the other was from a middle class family.

And let's say these 2 met each other and decided to switch lives for at least 6 months?

Well, this is where Kwon Jenny and Park Bom come in the picture.

This plan seemed fun and easy at the time but Jenny forgot to mention one little important detail- her older brother, Jiyong...

But Bom also forgot to mention something as well- her past...

Will they succeed or will they get caught up in each other's lives?