After transmigrating into a romance novel as Bella, the younger sister of the Beast’s first wife, she decides to take her sister’s place as his bride to avoid a disastrous fate.

Her plan is simple: divorce the Beast, claim a desolate piece of land as alimony, and become a wealthy and beautiful divorcee. However, the masked Grand Duke proves far more cunning than she expected, refusing to let her go so easily. Now, Bella must balance her ambitions, her responsibilities toward her younger sister, and her increasingly complicated relationship with the Beast.