The real world is a hostile place for twelve-year-old Bren, his schooldays stalked by vicious bully,Shaun, and his family life fractured at home. Ever since his sister Evie died in an accident, Bren's onlysafe space is Furthermoor, an imagined world of mechanised trees and clockwork animals, where Evie is still alive.

In Furthermoor, no one can hurt Bren...until the mysterious Featherly arrives.