When Hattie visits her granny for the first time in years, she's not sure what to expect. Granny has always been unusual. Now she's gone missing without trace.

Hattie is determined to find her. But in the strange little village where Granny lives, nothing is as it seems. Is magic real here? What is the shadowy place known as the Un Forest? And who is the mysterious girl in wooden armour?

One thing is certain. An ancient evil is stirring in Brokewood-on-Tandle... and only Hattie can stand against it.