Ellie Horner has gone missing, and there's snow in September. The whole world has turned upside down. The whole world is holding its breath.
When Ellie meets an angel called Plum in the park one day, little does she realise that he's there to protect her from the Land of Starless Night. And when the wolf-woman comes to call, little does Ellie realise how much in need of a guardian angel she really is . . .