at FMovies. Once on This Island is a one-act musical with a book and lyrics by Lynn Ahrens and music by Stephen Flaherty. Based on the 1985 novel My Love, My Love; or, The Peasant Girl by Rosa Guy, it is set in the French Antilles archipelago in the Caribbean Sea. It concerns a peasant girl on a tropical island, who uses the power of love to bring people together of different social classes.