Grace was only adopted by the elite Harrison family to serve as a 'human blood bank' for their sickly son. Her life is a quiet tragedy until the Harrisons' biological daughter, Claire—a ruthless time traveler who knows the future—returns to reclaim her throne and eliminate Grace. But fate has a different plan: another soul, Gracie, transmigrates into Grace’s body with her own knowledge of the future. No longer a submissive sacrifice, the new Grace begins a cold, systematic counterattack to dismantle the Harrison empire and rewrite a destiny that was meant to end in shadows. Watch the underdog rise to become the master of her own life.