The Real Heiress Is a Gladiator

Undefeated underground fighter. Real duke's daughter, lost 20 years. Only smells gold. Fake heiress plays victim. Family loves her. She fights back. Duke bets she fails. Perfect score. He hires killers. Her mother picks the fake, leaves her to die. She snaps ropes, smirks: "You nobles suck at killing." Hunt begins.