Many things have happened in the past year. Katara left Aang for Zuko, Aang used energybending to give Teo the skill to use Airbending, Haru and Toph became a couple, The Mechanist created a machine so Team Avatar could go to the Spirit World when they needed to, and Aang finally got Full Control of the Avatar State by opening his 7th chakra by letting his attachment to Katara go.
Now Aang, Sokka, Haru, Toph, Suki, and Teo are living in the Northern Air Temple while Katara and Zuko are living in the Fire Nation.
One Day Aang mysteriously got grabbed by an unknown spirit and was taken to the Spirit World. Sokka, Suki, Toph, and Teo went in to save him. Haru didn't go because he needed to power the machine using Earthbending. It took 2 years for everyone to find Aang, and then they took him back to the mortal realm. Everyone who went in was suddenly much taller.
Sokka: How long did it take us?
Haru: 2 days
Sokka: WHAT!! In the Spirit world it felt like 2 years.
Haru: I guess that's why you guys are suddenly taller.
Toph: I guess there is a time difference.
The next day they were visited by Azula who apparently escaped from prison she quickly attacked them with a bolt of lightning. Aang quickly redirected it into the sky and then easily went into the Avatar state. Everyone was surprised at how easily Aang got into the Avatar State. Aang quickly captured her by Earthbending, then he took away Azula's bending and sent her to Zuko so he could handle her.
After the fight
Sokka: Aang how did you control the Avatar State?
Aang: I simply opened my 7th Chakra
Sokka: How did you open it?
Aang: By letting my attachment to Katara go.
Everyone was shocked.
Sokka: But I thought you liked her a lot?
Aang: Well she's with Zuko now so I have to move on
Sokka was speechless he didn't believe Aang would leave Katara behind.
Everyone's Ages are
Aang: 16
Sokka: 18
Haru: 16
Toph: 16
Suki: 18
Teo: 17
