To Ellis, a girl raised within the quiet walls of an abbey, the noble-born Selena Kate was more than just a friend—she was a deeply trusted, irreplaceable confidante. Yet, despise-ridden and neglected by her own cruel father, Selena was ultimately used as a sacrificial scapegoat for her elder sister, losing her life in a tragic betrayal.

Consumed by blinding grief and seething rage over the loss of her beloved friend, Ellis makes a desperate, dangerous vow: she will assume Selena’s identity, infiltrate the corrupt Kate household, and burn their cruel family to the ground from the inside out.

The very night Ellis steps through the doors of the Kate estate wearing Selena’s face happens to be a momentous occasion—the grand wedding ceremony between Selena’s manipulative elder sister, Natalie, and the notoriously formidable Grand Duke Cain Durand.

Having successfully breached enemy territory, Ellis burns with cold vengeance, ready to dismantle the Kates piece by piece. Yet, just as her dangerous charade begins, her meticulous plans hit a completely unforeseen complication: for reasons she cannot comprehend, Grand Duke Cain Durand—her sister’s newlywed groom—begins showing an intense, undeniable affection toward her instead!