I Took My Dead Twin’s Place For Vengeance

Elder twin Diana returns home to pose as her murdered younger sister Clara for revenge, exposing the conspiracy of son-in-law Julian and best friend Evelyn to seize the family fortune. The real Clara, disfigured and amnesiac, had been deceived all along. After uncovering the truth of their murder plot, she stabs Julian to death at a grand banquet before ending her own life with poison. Diana walks away alone in the end.