A Knight of the Seven Kingdoms is an upcoming fantasy drama and official Game of Thrones prequel adapted from George R. R. Martin’s Tales of Dunk and Egg. Set a century before the events of GOT, the series follows Ser Duncan the Tall and Prince Aegon Targaryen.A Knight of the Seven Kingdoms is an upcoming fantasy drama and official Game of Thrones prequel adapted from George R. R. Martin’s Tales of Dunk and Egg. Set a century before the events of GOT, the series follows Ser Duncan the Tall and Prince Aegon Targaryen.