Seolhee loves to dance, but has never had any sort of self-confidence because of her appearance. That all changes when she joins a dance class and meets Kang Insoo, a handsome dancer that is kind to everyone. Seolhee wants to perform and show the world that there's more to her than meets the eye. But how can she show them when she knows she's ugly?

Everyone knows the story of Cinderella: prince falls for working peasant girl, they get married, and they live happily ever after. But what if Prince Charming was already happily engaged to another princess? Will Cinderella still get her happy ending or will she remain a working peasant forever?