For ten years Neptune and Aria Morel have lived with their abusive, alcoholic Uncle, trying to survive until the day they can run away. But fate has other plans for them. Strange things are happening to them, Aria has grown wings, and Neptune seems to have gained control of water. Before they can make sense of these changes, the man who they once called their uncle has kidnapped Aria and Neptune has been captured by a strange Captain on the oddest pirate ship he has ever seen. His destination is unknown, and the fate of his sister a terrifying mystery. Neptune must find Aria, but events beyond his control take him on the adventure of a lifetime. Will he find her? Or will they both remain lost forever?