Long ago, the four nations lived together in harmony. Then, everything changed when the Fire Nation attacked . Only the Avatar, master of all four elements, could stop them, but when the world needed him most, he vanished. A hundred years passed and my brother and I discovered the new Avatar, an airbender named Aang, and although his airbending skills are great, he has a lot to learn before he's ready to save anyone. But I believe Aang can save the world.