Elsie and her sister live on a ranch with their father, Robert Duncan, a wealthy city man, comes to stay at their house while on a hunting trip. He becomes infatuated with Elsie's sister and persuades her to run away with him and marries her. Through a telegram, Elsie and her father learn than Duncan is already married and has a child. This news kills the father and Elsie sets out for the city and finds her sister. She tells her that Duncan has another wife and pleads with her sister to return home. The sister, feeling the disgrace, disappears. Elsie later finds her in a hospital as she lies dying and plans to trap Duncan so as to avenge the wrong he has done her sister. She becomes an entertainer at a café which Duncan frequents. Being masked Duncan does not recognize her but becomes quite fascinated and shows her marked attention. Elsie instructs the chief of police that she may soon need his services as a married man is annoying her. One night when Duncan calls Elsie springs the trap she has set for him. She tells the story of her wronged sister and then for the first time tears off her mask and he recognizes her. She holds him off at the point of a revolver, tells him that she has sent copies of his letters to the newspapers, and the originals to his wife, and then telephones to the police who come and arrest him. Elsie then returns to the ranch and the foreman whom she loves.