Getting told by some strange earth bender that the way that they're dressed makes them look crazy isn't exactly what Sokka wants to hear. After spending a few hour foraging for food and finding nothing but nuts, all she really wants is something to eat. But instead they ended up on some crazy chase after this earth bender… who is claiming he isn't a bender.
And then someone from the Fire Nation shows up, and Sokka isn't at all surprised to see him extorting the people from this small town. She listens while they talk about the Fire Nation and bending. The more Sokka hears about Katara's water bending, the quicker she wants to get the younger girl to the Northern Water Tribe. But when Haru's mother explains that they take away benders, Sokka wants nothing more than to keep her sister close to her.
Sokka ends up having to let go of her sister too soon when they come up with a plan to free the earth benders from the metal Fire Nation ship. After twelve hours of separation they sneak on the ship to get Katara.
"Your twelve hours are up; where's Haru? We've gotta get out of here."
"I can't."
Sokka grabbed her sister's arm. "We don't have much time. There are guards everywhere. Get on!"
Aang asks Katara what's wrong, and that's when she explains why she can't leave. She still wants to help the people there. There's a bit of the disagreement, but once again, Katara wins and the trio stays behind to help. They figure out a way to get coal for the earth bender's to use, and soon it is morning.
"There's the intruder!" Some guard yells, and soon the water tribe siblings are surrounded. Hopefully Aang is doing his part, but just in case Sokka gets her boomerang out to fight with. Some older earth bender yells at Katara to stop, but Sokka knows that's not going to stop her from trying. Even the wardens threat of death does nothing. The earth benders not fighting back does put a dampen in Katara's spirit, but soon enough Haru and his father and all the other bender's are fighting.
Surprisingly enough, Sokka fights too. She uses her boomerang to break the spears of the Fire Nation guards and throws the sharp pieces up for Momo to play keep away with. Once they are disarmed she uses what the Kyoshi Warrior taught her to knock some of the guards off the ship before the earth benders do their final big push to get the Fire Nation off.
Soon enough the trio is back on Appa, having said their goodbyes to Haru and the earth benders.
"You know Sokka, for saying that girls can't fight, you sure were doing a lot of it back on the boat." Katara points out.
"I didn't say girls can't fight Katara. I just didn't think that they should fight…" Sokka pauses. "Or maybe I didn't like the idea of them being in danger?" Sokka tries to collect her thoughts. "But then again, even if someone isn't fighting doesn't mean that they're not in danger." The train of thought lead Sokka to think about her mom. She's then horrified when she looks at Katara's neck and sees that her mother's necklace is no longer there. "Mother's necklace…" Sokka says pointing at Katara's neck.
"It's gone!" Katara finishes with a horrified look that matches Sokka's.