you're reincarnated as the poor daughter of the count that got destroyed by one of the raiden's family. You experienced your bad past but now, you can change it, with one of their heir Scaramouche, you both will take over the heir by marriage soon and you can get your revenge on three of the raiden heir (Kabuki, Elias and Khriss)

all you have to do is listen to your fiance, he's a dangerous man (based on webtoon the predator's fiance 😉)