A sighting of the rare frangipani fruit fly sends Lilly's scientist parents off in search of the fabled Shipwreck Islands. In this Smithsonian's Notable Book for Children, Lilly awaits their return at the home of her great-uncle Ernest, the chief librarian of Mundelaine, a town that seems to have more than its share of piratical-looking characters lurking about. When news comes that her parents' ship has wrecked, she must overcome her fear of the sea, find the hidden island, and outsmart a bunch of treasure-hungry pirates to save the day.