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."