Some dreams are too big to be kept in bottles.
Walter Higgins is a scrappy child with a great imagination, but he feels lost and not quite sure of himself when he is shipped off to Boston to visit his unknown Great Aunt Hortensia ("the Warden").Walter is sure he is in for the worst summer ever. But then he befriends a mysterious neighbor, Old Zeb - a lonely, grizzled sailor who builds ships in bottles, and Old Zeb lets Walter in on the Great Secret...