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. Silas is bullied at school because his words will not come. He wishes he could live in silence as animals do. One day, Silas helps an injured wolf. Then he enters the secret world of the Forest, where the last remaining wolves fight to survive. But even there, language is power. Can Silas find his voice in time to help his wolf friends – can he become the Wolfstongue?