The summer holidays have started. Alfie Foggle, happy that school has now finished, is looking forward to spending his holidays doing absolutely nothing. A world away, Braddle and every other inhabitant of Carporoo are building a new city, a new home, but people are disappearing and no one knows why. Braddle sets out to solve the mystery and puts himself and everyone he loves in danger. On a quiet summer’s morning, Alfie’s plans for doing nothing are turned upside down as he discovers Carporoo. Braddle needs help and only Alfie can give it.