Alf and Wilf are back, and this time they've been tasked with investigating suspicious activity at Gribble school. The trouble is, there isn't any.It looks like they've got no chance of catching whoever's been spying for a magical corporation from another reality . until someone loses their head. Literally. All of a sudden there's suspicious activity all over the place and Alf and Wilf no longer know who to trust. It's time for another trip over the Nameless Hills but will the witch with the castle in her cottage help or hinder them? With a pair of sarcastic horses, a magic carpet and some cocktail umbrellas all getting in on the act, can Alf and Wilf uncover the spy and save the school from poisoned magic before it's too late?.