The story takes place in a fictional medieval European kingdom, where the Nolan Marquisate holds hereditary glory but owes one million gold coins to the Royal Treasury. In her past life, the fake daughter Elvira Nolan exhausts all her effort to clear the debt, yet the Nolan household discards her like trash and leaves her to die a tragic death. Reborn into the past, she returns to the very day the real daughter comes back; she neither submits nor fights directly, but secretly schemes to extract herself from the household's mire, joins forces with the Third Prince Cassian Montgomery to bring down the First Prince Roland Montgomery and the entire Nolan family, and ultimately exposes their crimes, casts off her identity with the family, and embraces a new life.
