Neil and Liz Maloney have a secret: Their father is the keeper of the Weatherbox, a magical phone booth that controls the changing of the seasons. But this year autumn does not arrive. Instead a mysterious tourist of magic shows up at their doorstep, along with two nonsensical hags and one cat-shaped bog beast. The only one not taken by surprise is their neighbour Mrs. Fitzgerald, who seems to be able to make the elements do her bidding.
Now it's up to Neil and Liz to discover the source of Mrs. Fitzgerald's power and restore order to the climate.