Raeliana ended up at the Duke's mansion because she was reincarnated into the world of a novel as Raeliana McMillan, a minor character who was destined to be killed by her fiancé. To avoid her fated death, she makes a deal with the male lead, Duke Noah Volstaire Wynknight, to pretend to be his fiancée in exchange for protection and to keep silent about secrets she knows from the novel's story. This arrangement leads her to move into the duke's mansion as part of their engagement ruse, with the goal of escaping her original tragic fate while unfolding deeper political intrigue and romance between her and Noah.