Avatar: legend of the hunter

before the avatar came to be, there existed a society of people that protected humanity from the darkness and the unknown. they called themselves hunters. thousands of years later a lone hunter on an assignment to the abandon southern air temple ran into a..........a bit of a snag when he found three kids on his job. join the hunter as he journeys with Aang, Katara, and Sokka that will not only decide the fate of the nations but the fate of humanity as well