Between bullies at school and changes at home, Charlie Challinor finds life a bit scary. And when he's made guardian of a furry fox cub called Cadno, things get a whole lot scarier. Because Cadno isn't just any fox: he's a firefox - the only one of his kind - and a sinister hunter from another world is on his trail. Swept up into an unexpected adventure to protect his flammable friend, Charlie's going to need to find the bravery he never thought he had, if he's going to save the last firefox.