

While fishing, the siblings Sokka and Katara start to bicker with each other over the latter's waterbending abilities. Sokka and his younger sister Katara are the oldest of the village children in the South Pole. The men of the village all sailed abroad to fight, leaving behind the women and children. Even the Southern Water Tribe village of Wolf Cove, located in the distant South Pole sea, has been affected by the Fire Nation's war. One hundred years passed, and people began to lose hope that the Avatar would ever return and bring peace back to the world. During that time, the tyrannical Fire Nation used the opportunity to wage war on the other three nations, seeking to conquer them.

However, the Avatar disappeared one hundred years prior and has not been seen since. Long ago, the legendary Avatar kept the world and its four nations at peace with each other. While playing, Aang and Katara mistakenly trigger a booby trap in an ancient Fire Nation ship, revealing Aang's whereabouts to the nearby Zuko.

After witnessing the beam of light that shot through the sky after the two broke through the ice, Zuko, exiled prince of the Fire Nation tasked with finding the long-lost Avatar to restore his honor, becomes intent on capturing him. After freeing him and his flying bison named Appa, they learn his identity as an airbender, long thought extinct, and bring him back to their village in the Southern Water Tribe. While fishing, siblings Katara and Sokka discover Aang, a young boy frozen in an iceberg.
