In a world where the elements, Water, Earth, Fire, and Air can be controlled by people known as "benders", the Fire Nation is waging a ruthless war to control the other great nations. The only hope for stopping the war rests on the shoulders of a young boy named Aang (Noah Ringer). The last known Airbender and survivor of the peaceful Air Nomads, Aang is the Avatar.
The Avatar is the physical embodiment of the world, with the ability to control all four elements and draw upon the combined power, knowledge, and experience of the Avatar's previous incarnations. The Avatar's duty is to maintain peace between the four nations and the spirit realm, ensuring that the world remains in balance, despite the Fire Nation's war.
Aided by a protective teenage Waterbender named Katara (Nicola Peltz) and her warrior brother Sokka (Jackson Rathbone), and his forever loyal Sky Bison Appa, Aang begins a perilous journey to restore balance to their war-torn world. Standing in their way is the ambitious Fire Nation Admiral, Zhao, (Aasif Mandvi) and Prince Zuko (Dev Patel), the banished prince of the Fire Nation who seeks to capture Aang to regain his honor.