Fely and Anne are twins orphaned when their mother dies en route from Ireland to America. Fely is adopted by the O'Tandys, who live in New York's Shantytown, and Anne is adopted by the wealthy De Rhondos. Fely grows up without knowing her sister and becomes a dancer in Tony Pastor's theater. Dirk De Rhondo, Anne's stepbrother, is attracted to Fely, and after protecting her during the great Orangemen's riot falls in love with her. She consents to his proposal but later retracts when Dirk's father dispossesses her family. Fely's father, however, becomes wealthy when his investment in Edison's incandescent light pays off, but Dirk's father is ruined. Fely saves De Rhondo's bank from a run by making a large deposit, thus winning over Dirk's family and paving the way for their marriage.
—AFI