Sister Against Sister (1917)

Twin sisters Anne and Katherine are separated as children when their parents decide to go their separate ways. Under her mother's influence, Anne develops into a respectable young woman, while Katherine, under her father's tutelage, becomes a callous adventuress. Anne falls in love with Dunsmore, a gubernatorial candidate running as a child labor reformer, while Katherine allies herself with his opponent, Huxley, a corrupt manufacturer. After losing the race, Huxley decides to eliminate his rival permanently. Using Katherine to lure Dunsmore to his apartment, Huxley enters and draws a gun on his rival. As he aims, Katherine pulls a gun and kills Huxley. Dunsmore, mistaking her for Anne, lets Katherine escape and is arrested for murder. At the trial, Dunsmore withholds the name of the mysterious woman, and Anne gives herself up as the murderess. Katherine, driven half mad by visions of Huxley, finally confesses all. Upon seeing the resemblance between the two sisters, Dunsmore realizes that Anne was offering her life for his and rushes to embrace her. They leave the courtroom together as Katherine is led to a cell.