Two young men from different backgrounds find their destinies linked when they meet up in the world of illegal bare-knuckle fighting.

When the world is under attack from terrifying creatures who hunt their human prey by sound, 16-year old Ally Andrews (Kiernan Shipka), who lost her hearing at 13, and her family seek refuge in a remote haven.

An unlikely group of heroes sets off on a dangerous quest to places far beyond their home, where they must face their inner demons and come together to save their world.