After a failed invasion of the Fire Nation, Zuko defects and joins Aang as his firebending teacher. The Final Showdown
The series consists of divided into three seasons, termed "Books": avatar - the last airbender the complete series
A pair of Water Tribe siblings, Katara and Sokka, discover a young boy frozen in a sphere of ice. That boy is Aang—a 12-year-old monk, a pacifist by nature, and (surprise) the long-lost Avatar. He’s also the last airbender left alive. After a failed invasion of the Fire Nation,