Silas is getting bullied at school because his words will not come. He wishes he could live in silence as animals do.

Deep in the Forest, the foxes live in an underground city built by their wolf slaves. The foxes’ leader Reynard controls everything with his clever talk.

One day Silas meets an injured wolf and helps him. Isengrim, Hersent and their pups are the only wolves left, moving between the human and animal worlds using hidden passageways as they fight to survive.

When Silas enters the secret world of the Forest he will learn that, even here, language is power. Can he find his voice in time to help his wolf friends - can he become the Wolfstongue?