Wanda Hubbard lives a life of crime in the city while her mother and sister Lucille lead a peaceful life in a small country town. One day, while robbing the safe of Major Andrew Clark, Wanda and her partner Red Smith are apprehended, but both manage to escape. Wanda flees to her mother's house and Red follows her, later departing for Arizona but pledging to marry Wanda upon his return. Meanwhile, Mrs. Hubbard dies as a result of a fall, confessing on her deathbed to Wanda that Lucille is really the daughter of her brother-in-law, wealthy Major Clark. After the funeral, Wanda determines to substitute herself as Clark's daughter and goes to New York where she is accepted by Clark and his protégé Roger Burney, with whom she falls in love. Later, Lucille comes to New York and wins Roger's love, making Wanda insanely jealous and driving her to destroy the portrait of Clark's dead wife lest her deception be discovered. With Red's reappearance, Wanda's web of deceit begins to untangle when he threatens to expose her. The two struggle, Wanda is killed and the wounded Red confesses the truth about Lucille's parents. Clark welcomes his daughter and Lucille wins both a father and a sweetheart.