Avatar Last AirBender

One hundred years before the start of the series, a twelve-year-old Airbender named Aang learns he is the new Avatar. Fearful of the heavy responsibilities of the position, and being separated from his beloved mentor Monk Gyatso, Aang flees from home on his animal guide, a giant six-legged flying bison named Appa. During their flight, they become caught in a fierce storm and crash into the ocean; Aang's protective Avatar State is triggered, and it encases the pair in an iceberg, in suspended animation. Meanwhile, Fire Lord Sozin, who killed the previous Avatar because he would have acted to stop his war plans, begins a genocidal assault on the Air Nomads. Sozin knew that the new Avatar would be an Air Nomad, and eliminated them in order to ensure his domination of the world would not be interrupted. Ironically, Aang is the only Air Nomad to survive the attack.

One hundred years later Katara, a fourteen-year-old Waterbender girl, and her older warrior brother, fifteen-year-old Sokka, free Aang and Appa from the iceberg. The three travel to the Northern Water Tribe so Aang and Katara can learn Waterbending. While on their journey, Aang and friends visit the Southern Air Temple where Aang discovers that the Fire Nation wiped out the Air Nomads. At the Southern Air Temple Aang meets his Avatar guide, Avatar Roku. on their journey, the trio is constantly pursued by Prince Zuko, the exiled son of Fire Lord Ozai, who can only reclaim his honor and throne if he captures the Avatar. Zuko travels with his uncle Iroh, a legendary Fire Nation general and the older brother of Ozai. Competing with Zuko for the Avatar is Admiral Zhao, who leads a Fire Nation assault on the Northern Water Tribe. The attack is repelled thanks to Aang and his friends, but after the siege is ended, the Fire Lord tasks his daughter Azula to capture Zuko and Iroh, who are now considered traitors to the Fire Nation.