It's about a world of dragons with unique cultures, powers, and challenges. The graphic novel version likely brings the story to life visually, showing the dragon characters in action, their relationships, and the epic adventures they embark on.
I'm not entirely sure as I haven't read it yet. But generally, 'Wings of Fire' books often involve adventures in a fantasy world with dragons. So, this graphic novel might be about the same kind of dragon - related adventures, perhaps with new characters or a new plot twist.