After a lot of walking they make it to the Western Air Temple. While others explore the temple, Sokka, Katara, Aang, and Toph gather to figure out what to do now. They decide to go back to their old plan of attacking before the comet comes. Finding a fire bending teacher is the part that none of the group know what to do about.
Then Zuko shows up. He offers to teach Aang fire bending, but the group decides they don't want him around. Toph points out that Aang still needs a fire bending teacher, but all three of the old trio don't want to trust the fire bender. Zuko ends up hurting Toph, which makes them want to get rid of him even more. But then he helps save them from Combustion Man, and Aang reconsiders his offer for teaching him fire bending. The group reluctantly agrees to let him join because it's the only way Aang will learn how to fire bend.
Sokka shows Zuko to his room. "So, here you go, home sweet home, I guess, you know, for now. Unpack? Lunch, soon? Uhh… welcome aboard." Zuko smiles at her as she leaves the room. "This is so weird." She says to herself as she walks away. She realizes that she forgot to leave the blanket she has in her arms with him, so she turns back around.
"Let me tell you something, right now." Sokka hears her sister say. "You make one step backward, one slip-up, give me one reason to think you might hurt Aang, and you won't have to worry about your destiny anymore. Because I'll make sure your destiny ends… right then and there. Permanently." Katara slams the door and storms away.
Sokka counts to ten in her head before she knocks on Zuko's door. "Forgot your blanket." She says as she walks in.
"Uh, thanks." Zuko says looking up from where he had been slumped. "Did you hear any of-"
"Yep. I thought her threat on your life was a good touch." Sokka sits next to him on the bed. "And you thought you were the only one with an intense little sister."
"Still think she'll heal my scar for me?" He says looking at Sokka. The way their seated reminds Sokka of the Crystal Catacombs.
Sokka shakes her head. "And don't expect me to dive in front and save you next time. More than likely I'll be helping her take you out." Sokka stands. "Katara's got Aang covered, but if you hurt my sister or Toph …" Sokka pauses. "Well they're strong girls, I'll let them destroy you themselves." Sokka strolls out of the room after that, feeling a bit better.