After her parents passed away, Jung Yion was employed as a maid in the house of a conglomerate. She dreamed of escaping her old life by saving as much money as possible. One day, Yion received an unexpected proposal from Hyun Maehwa, her childhood friend who was also the youngest child of the conglomerate family she worked for. It turned out that Jung Yion had six benefactors tied to her fate, which she thought would bring her financial luck. At that time, she didn't know that this marriage was a very unfair contractual agreement. Could this 'Cinderella' escape from the unlucky prince?