Charlie Challinor’s life is a bit scary. Between bullies at school and big changes at home, every day brings a new challenge, and Charlie’s not sure he’s got enough bravery to face them on his own. But when a mysterious boy leaves him in charge of a mischievous cub called Cadno, everything changes. Because Cadno is no ordinary fox, he’s a firefox – and something sinister is on his trail. As a giant black hound starts sniffing round his home town, Charlie realises only he can protect the last firefox. And that maybe he’s brave enough to do that after all . . .