Trains pass through this little village without stopping. But if someone by some strange chance decides to get off there, they should do so quickly, because no passenger wants to linger in a land of storms, explosive apple trees, red tigers, and sorcerers. It is there, to visit Grandma Katy, that Peggy Sue and her friend — a blue dog — have set off. They must unravel the mystery of a giant butterfly whose wings are so vast they cover half the sky, and also discover the most terrible secret of ghosts — one that makes it possible to destroy them.