Miles, who loves puzzles and unexplained phenomena, and Ruth, who loves the idea that magic might be real, had been told stories of Allbyon and the witches and wizards who lived there, since they were very young - tales of mysteries unravelled in a world of magic. Are they just stories, or does the last remaining witch live amid the cosy mock-Tudor houses of the Triangle?
When the local cats start to go missing, they become involved in a mystery of their own, meeting people each with extraordinary stories. As the mystery is unfurled, they find themselves increasingly involved in magic and danger, struggling to save the fabric of reality and learning something about Allbyon and Britannia.