The Last Airbender Aang and his friends continue their quest to the Northern Water Tribe, visiting various Earth Nation cities. They soon learn that Aang must master all bending elements before the summer, when a comet will arrive that could empower the Fire Nation making them virtually unstoppable. Chapter 5: The King of Omashu Aang, Katara and Sokka are brought before a crazy old king, who seems to enjoy messing with the kids' heads. Chapter 6: Imprisoned Katara attempts to inspire the oppressed people of an Earth Nation city, occupied by the Fire Nation. Chapter 7: Winter Solstice Part 1 - Spirit World Aang, Katara and Sokka arrive at a town being terrorized by a mysterious force from the spirit world! Chapter 8: Winter Solstice Part 2 - Avatar Roku During the winter solstice, Aang must reach Fire Nation temple while dodging Prince Zuko, Commander Zhao, and the Fire Sages who guard it.