After being transported into an adult romance novel titled Beauty and the Beast of the Night, a young woman finds herself in the body of the younger sister of the beast's first wife, the woman destined to leave him deeply traumatized. Knowing that her older sister's future affair will ruin her own life as well, she decides to take her place and marry the beast instead. But she has a secret plan: become his ex-wife, claim a seemingly worthless piece of land as her divorce settlement, and turn it into a fortune when the imperial palace is eventually rebuilt there. Determined to become the empire's most beautiful and wealthy divorcée, she believes everything will go smoothly. Unfortunately, her beastly husband is proving much harder to handle than she expected!