Having been invalided out of the British navy, Davy Llewellyn plies his trade as a fisherman on the south coast of Wales. Investigating the wreck of a boat during a wild storm, he discovers an infant girl—the eponymous “maid of Sker”—whom he adopts. Her beauty and wit win a place in his heart that his own orphaned granddaughter can’t compete with. Llewellyn’s maritime activities also bring him to the Devonshire...