Revenge is not the only answer. The story describes how a person can improve and make those people feel ashamed in the same way. [Warning: This story involves a turn around rezendevedous politics. It may be difficult to understand the theme but it's actually like a game] The story doesn't revolve around a single character but the double pairs. Both antagonists were frustrated of their lives. Even after several reincarnations they end up with the same fates. Therefore betrayed Rubellia makes a proposal to the abused Seoyeon to change their paths of lives and try to live as each other. Maybe then their fates might change and then they can live a dignified and comfortable life. The suspense still remains as Rubellia uses black magic to ask for this final wish that costs both of their souls to be sold to the devil lord Lavane. The devil lord, Lavane had already had his eyes set on their souls as they were one of the purest and grants them their wish. But the fact still remains that both of them cannot trust anybody in their worlds. And they would have their general memories installed within 2 days of their arrival and the 1 rare memory per month. Thus they are tired and decided to play with the lives of people as they have played throughout their lives and reincarnations. Let the suspense begin..........