Navigating through the ocean puzzle is no piece of cake. When Cid is turned into a frog, he finds his piloting skill, not to mention his credibility with the crew, has severely dropped. And Oscar's meddling leads to the resurrection of a long-dead foe. But nothing so far has prepared the group for Ai's sudden disappearance in the Sea of Wonderland. Whisked away to a realm where the ocean floats above the sky, she meets a mysterious boy clothed in garments made from Flying Water. Ai, Yu, Lisa, and their allies will have their courage and patience tested as they push through, but hope and perseverance keep them afloat.