After being abused, tortured, and exploited by her best friend Lavienne for 14 lifetimes, Saint Dinah swears to get revenge. And luckily for her, she manages to capture the attention of Archduke Tersia, who adopts and renames her "Esther" to honor his late wife's wishes. With her new status and knowledge of Lavienne's true nature, Esther embarks on the long journey toward vengeance. But will she succeed? Or will her 15th life meet its demise due to Lavienne's greed?