Lord Sterling's Revenge

Charlotte Sterling (adopted daughter) and Joy Sterling (biological daughter) are sisters. Driven by jealousy, Charlotte plots to murder their father, Sterling, resulting in his death (in reality, amnesia). Charlotte frames Joy for mental illness and tortures her in a mental asylum. Sterling recovers, uncovers Charlotte's conspiracy and seeks retribution. A twist of fate nearly allows Charlotte to succeed again, forcing Sterling to summon subordinates to snuff out her plot.