Zuko has joined up with Aang's group and is now ready to teach Aang fire bending. Unfortunately, Zuko has found out that he has lost his ability and must now relearn it. Zuko and Aang travel to find the original source of fire bending so that they both can learn from The Firebending Masters.
- After beginning to teach Aang firebending, Zuko realizes his firebending is extremely weak, almost non-existent. Zuko tells the gang of the Sun Warriors, a firebending civilization existing centuries ago, the first people to learn firebending from dragons. Aang and Zuko head to the ruins to see if they can find anything out about firebending, but what they find is much more dangerous and surprising than they'd hoped.