Now that they found the Avatar of Water, they need to find the Avatars of earth, lightning, and air before the return of Sozin’s Comet. They will meet new enemies, gain new allies, and they will have to face the unexplained along the way, among them a strange cave that only love can help them escape, a swamp that has a spiritual connection, and a large desert. The one question on everyone's mind: how close will Twilight and Firebrand become?