What would you do if there was a school competition to make a dragon that can fly? Ryan always wins everything, thanks to his incredibly competitive dad. Ryan will have the state-of-the-art gadget like always. Harri would love to know what it feels like to win, just once, but there's no chance. And then someone new walks into Harri's mum's shop. Someone almost invisible. What would you do if you had a dragon. A real fire-breathing, chocolate loving dragon. But you can't tell anyone....