A tomboy, raised by a father who wanted a son, runs away from boarding school and gets a job at a firm.

Nancy Croyden, born of British nobility, languishes in the slums of New York after she elopes with Terrence Flynn, a groom on her father's estate. Nancy dies there, leaving behind a daughter, Susan Flynn, who grows to adulthood in the Bowery. In search of her family, Susan returns to England where she befriends Sir Bevis Neville, an English peer in disguise.