Henry is overjoyed. After the initial difficulties on Seven Fire, he has finally found his own dragon and formed a magical bond with him. Although training to be a dragon rider is no walk in the park, he and Phoenix make a well-coordinated team. But suddenly, Henry hears another voice in his head: a strange dragon is asking for his help. He is trapped in a dungeon from which he cannot escape without Henry's assistance. What is going on? And can Henry and his friends free the dragon?.