Aang, Katara, and Sokka travel to a temple on an island in the Fire Nation, so that Aang may receive Roku’s message. The three bypass a blockade led by Zhao; Zuko pursues them through the blockade, despite being banished from the Fire Nation. At the temple, they discover that the Fire Sages who guard the temple, are no longer loyal to the Avatar, but to the Fire Lord. The sages attack, but one proves to still be loyal to the Avatar and leads them to the temple sanctuary. Aang manages to enter the sanctuary after narrowly escaping capture. Zhao arrives, intending to apprehend both Zuko and Aang. Avatar Roku appears to Aang and informs him about a comet that Fire Lord Sozin used to begin the war by harnessing its power to enhance their bending. The comet will return by the end of the coming summer, and give the Fire Nation the power to finish the war with a brutal assault; Aang must master all four elements and defeat the Fire Lord before the return of the comet. Roku’s spirit manifests inside Aang’s body, repelling Zhao’s forces with a staggering display of bending that destroys the temple as Aang, Katara, Sokka, and Zuko escape.