Avatar, the Last Airbender. The PromiseAvatar, the Last Airbender. The Promise

A plan to force Fire Nation colonists from their homes in the Earth Kingdom has brought Fire Lord Zuko and Earth King Kuei to the verge of war. While Aang and Katara work tirelessly for peace between the two nations, Sokka helps Toph prepare her metalbending school to defend themselves against a rival class of firebenders! Will Aang be able to bring peace in time, or will his friendship with Zuko be destroyed and the world plunged back into war?