Joe isn't looking forward to leaving London and visiting his mother and her "new" family for Christmas. The last thing he expects is to meet up with a coven of witches on the train ride to Canterbury. But that is exactly what happens, and his life suddenly takes a very unexpected turn.

When he befriends Twiggy, a young witch in training, Joe is quickly caught up in a dramatic conspiracy surrounding the greatest magic book in history. Joe and Twiggy are sure that they can do something to help, but can they solve the mystery before it's too late?