Falsely accused of grand treason by the scheming foster daughter Bianca, legitimate heiress Rosalie loses her lower limb in an undead swarm and suffers wrongful incarceration. Upon her release, her callous father Gerald welcomes her with brutal beatings, siding entirely with the manipulative impostor who stole Rosalie's childhood status. Bianca attempts to burn Rosalie alive in an abandoned barn, but Rosalie survives and gets forced into a sacrificial marriage with comatose military commander Cassian.
Rosalie soon discovers Cassian is entirely conscious, faking his paralysis to expose internal military saboteurs while honoring an old debt to shield her. Backed by Cassian's elite private militia, Rosalie stages an undeniable exposure at the city's grand victory gala, revealing DNA evidence that unmasks Bianca's elaborate lineage fraud. As the deceptive family begs on their knees amidst an encroaching horde breach, Rosalie watches their stronghold collapse in poetic retribution.
