Maury Brady, a product of New York's East Side, has learned the craft of safe-cracking and shoplifting from her uncle, "Nunc." While "working" a department store, she captures a lost poodle belonging to Mrs. Hardage, wife of a millionaire. When Maury later is caught lifting some lace, Mrs. Hardage vouches for her, takes her into her home, and puts her to work on a crusade against profiteers.