Finally arriving at his destination of the Northern Water Tribe, Aang must master Waterbending and, together with his friends, defend the city from Admiral Zhao's greatest attack yet!

Chapter 17: The Northern Air Temple:
After hearing rumours about surviving Airbenders, the kids journey to the Northern Air temple to see for themselves.

Chapter 18: The Waterbending Master:
The kids reach the Northern Water Tribe, and Aang and Katara look for a Waterbending Master. Meanwhile, Zhao plans an attack and Zuko continues his quest for the Avatar.

Chapter 19: The Siege Of The North, Part 1:
The Northern Water Tribe braces itself for an attack by Admiral Zhao's Fire Navy fleet. In the heat of battle, Aang struggles to defend the city.

Chapter 20: The Siege Of The North, Part 2:
Zhao's invasion breaks through the outer wall of the Northern Water Tribe's defences, and he reveals a sinister plan to destroy the city.