Part 4/9:
Aang, having left the Southern Air Temple, encounters a fierce storm and ultimately ends up submerged in icy waters. He is later rescued by siblings Katara and Sokka from the Water Tribe. Unaware of the catastrophic events that have unfolded, Aang soon discovers that he is the last Air Nomad and the lost Avatar, having been asleep for the past 100 years due to a deadly encounter with the Fire Phoenix Empire.
As Aang adjusts to his new reality, Katara's budding waterbending abilities catch his attention, and he decides to mentor her. However, they soon attract the unwanted attention of Prince Zuko from the Fire Phoenix Empire, who is desperate to capture the Avatar to regain his place in his father's favor.