It's a good day for sailing. Finn lives by the sea and the sea lives by him. Every time he looks out his window it's a constant reminder of the stories his grandfather told him about the place where the ocean meets the sky. Where whales and jellyfish soar and birds and castles float. Finn's grandfather is gone now but Finn knows the perfect way to honor him. He'll build his own ship and sail out to find this magical place himself! And when he arrives, maybe, just maybe, he'll find something he didn't know he was looking for.