Imagine if there is an element you could control- water, fire, earth or air. Which one would you choose? This movie tells the story about a legend of a powerful beings capable to control all of them- called Avatars. It starts when the world was divided into four large kingdoms, based on the element that the nation masters to control. Hundreds of years after a great war, siblings from the Water tribe, Katara and Sokka (Nicola Peltz and Jackson Rathbone) find a frozen bubble with a strange boy inside. Soon, they reveal that this boy, Aang (Noah Ringer) is one of the powerful Avatars, and that he is the last of his kind. When the war started, his whole tribe was wiped out and he was the only survivor by a chance, because he was rebellious and ran away from school with his pet. Somewhere along the way he managed to get trapped in a bubble and was frozen for over a century. As he didn't complete his training and is unable to do so now, the boy must find a way to master all the four elements and restore the balance and peace to the world before another war starts raging between these four kingdoms. And that is only the beginning.