The period is 1876; trains of settlers are moving westward. It is the time of pioneers and prairie schooners. Dan is leading one wagon train and his party fall in with another led by a stalwart Indian, Mahomena. They proceed together. Amongst the latter party is a young girl, Eunice, and she and Dan are immediately attracted to each other

"Dad" is the manager of the telegraph room of the Kripps News Service, and for forty years has rendered them invaluable service. Everyone, from Moss, the resident manager, down to the office boy, fairly swears by Dad. A new general manager, Harrison Cole, is engaged and starts out on a tour of inspection of the various branches.

Impoverished Molly Hanlon is befriended by crooked gambler Lee Kirk, she marries him in a phony ceremony. While frequenting Kirk's gambling den, Molly meets Miles Rand, the dissolute son of Judge Rand, whose obvious attraction for her encourages Kirk to swindle him out of his money. Penniless, Miles accepts a loan from Molly and returns East to study law. On the day that Molly learns that her marriage is not legal, the gambling den burns down and Kirk is presumed dead. After escaping with Kirk's money, Molly goes East where she encounters Miles, now a district attorney. In spite of the objections of Judge Rand, Molly accepts Miles's proposal, but after Kirk arrives in town, she calls off the engagement. When Kirk enters her apartment through a window, Molly kills him in a panic and is arrested for murder. The still faithful Miles defends her in court, and after her acquittal, she confesses her past and reunites with her old love.