Sadie Sullivan leaves Ireland to live with her married sister in New York. Troubled by her worthless brother-in-law, discouraged with her low-paying five-and-dime-store job, Sadie reads a story about a chorus girl who married a millionaire, she decides to join a musical-comedy company. Having befriended mission clergyman Reverend John Page, Sadie reads a Bible backstage and is surprised at the other girls' loose morals. Her "saintly" reputation among the others inspires press agent Jack Mills, looking for a new angle, to devise a routine built around Sadie, now billed as "The Saintly Show Girl." After millionaire Dick Carrington switches his attentions from leading lady Dollie Delmar to Sadie, their subsequent engagement arouses Dollie to attempt to tarnish Sadie's image. Dollie sends Sadie a letter, supposedly from a friend, to meet her at a roadhouse that Dollie knows will be raided, but after Reverend Page explains Sadie's presence there satisfactorily to the police and Dick, Dick marries her.