Live and Let Live.

While on a train trip, Mary Ryan runs into her old friend Jane Loomis. Mary was once a professional thief but is now reformed. Jane tells her that her uncle, Judge Loomis, has invited her to live with he and his family, but that she is planning to elope with her boyfriend instead. When the train arrives at the town where Judge Looms lives, Mary gets off and passes herself off as Jane. Complications ensue.