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?

Having finally made it into Ba Sing Se, the kids are given a house in the upper ring. The kids are anxious to tell the Earth King their plan, but there are complications. Meanwhile, still convinced that Iroh and Zuko may be from the Fire Nation, Jet decides to take matters into his own hands and do whatever it takes to get the refugees to reveal their true nature.