Theodore Williams and the Dragonfly's Enigma

The Four Elders' magic is fading, and Hogwarts Castle's spirit is slowly perishing. Our three heroes now have to take matter in their own hands, and deliberately try to save the school. But when their only hope is lost and unpredictable, the three heroes don't know what to do. Will Theodore, Edward and Penny achieve the impossible? Or will this be the end of Hogwarts forever?