When Aang and his friends meet a professor who knows of a library that contains information about the world, Sokka decides to go there to try and find some information to use against the Fire Nation. The library is guarded by the knowledge spirit, Wan Shi Tong, who doesn't welcome humans into his library, because he believes they only seek information for evil purposes. When Wan Shi Tong discovers Sokka wasn't being truthful with him, he begins to sink the library, bringing the kids down with it. Will everyone be able to escape the library in time? And who are the strange benders who are trying to kidnap Appa?

When Aang and the gang meet up with a group of refugees, they tell them where they can get on a ferry to Ba Sing Se. But after a series of events they have to take a deadly route called the serpent's pass with the help of an old friend, Suki. Meanwhile Zuko and Iroh meet up with Jet and the Freedom Fighters. Will Aang and the others be able to make it through the Serpent's Pass and ultimately to Ba Sing Se?