But when the group becomes trapped in the cave, it's up to Aang and Katara to save the group by trusting in love ... and possibly questioning their relationship. Meanwhile, Zhao and his forces continue to press deeper into the Northern Water Tribe. This clip-filled special recaps the adventures of our travelers on their journey throughout the Avatar world, all en route to their ultimate destination, the Northern Water Tribe. Also, Iroh makes a powerful stand and Zuko struggles to keep his plan intact. On their way to Omashu, Aang, Katara, and Sokka meet a group of nomads who show them a shortcut through the "Cave of Two Lovers."

Having made it to the outer wall of Ba Sing Se, the kids confront a Fire Nation army that is driving a massive Fire Nation drill, which poses an imminent threat to the last Earth Kingdom stronghold. When Katara inadvertently stumbles across a waterbending scroll that can help improve her ability while Aang is looking at a pirate’s store, she decides to steal it after she realizes that she couldn’t hope to afford it; but will she be capable of stealing from the pirates without causing herself and her friends trouble? However, when the firebending master refuses to even see Aang, will Aang be able to prove he’s ready to learn how to firebend despite the fact that he lacks discipline?

Everyone races against time to stop Azula's sinister plan.

However, when the messenger gives Aang the message to give to Bato, Aang betrays his friends in a way Katara or Sokka could never imagine. Meanwhile, Uncle Iroh is offered his own tea shop in the upper ring, and Zuko discovers the avatar is in the city.

In this special episode, we flash back to the moment Appa was stolen, find out where he has gone, who he has met along the way, and—most importantly—where he is now. Meanwhile Azula goes in search of old friends to help her with her mission. In a nearby Earth Village, the gang meets a teenage earthbender named Haru. What they find is a bunch of people who are not airbenders, but have mastered the art of gliding; though this upsets Aang because they have been defacing the temple. On the verge of losing, Aang gets hit in the back of his scar which sends him into the Avatar State.
After the tracker is unable to track Aang, the rest of the group decide they must find Iroh. The Avatar Returns 24m.

Toph's instructing abilities come into question when Aang cannot seem to overcome a block that keeps him from earthbending.

Aang struggles to fight his own desire to face the Fire Lord before he is ready. Aang decides to walk across with the two groups to ensure they don’t fight one another.
Tired from trying to escape a machine that shows up every time they try to sleep, Aang and the gang have to escape Azula and her team, but their exhaustion leads to a tight situation. However, they must evade a critical foe, Prince Zuko of the Fire Nation, who wants to capture Aang. There he will learn what he must do to restore balance to the world. While on their way to the North Pole, Aang and his friends arrive at a giant canyon where two groups of refugees are bickering over who should get to go across. Aang tells Sokka and Katara about his childhood as they explore the temple, but they soon discover something that Aang never expected.

A play recounting the gang's adventures does not sit well with Aang and his friends, except for Toph who enjoys it very much. Four days prior the invasion, Aang becomes nervous over his soon-to-come confrontation with the Fire Lord. When Wan Shi Tong discovers Sokka wasn't being truthful with him, he begins to sink the library, bringing the kids down with it. Zuko only wishes to be accepted, and help the Avatar, but will the group allow him to teach Aang firebending? Sokka and Zuko go to the "Boiling Rock" Prison which is in the middle of a volcano to rescue Sokka's father. When Sokka doesn't find him, he feels like he has failed... again... then his hopes are raised when he finds Suki. It's up to Aang to go up on his own to save his two friends.But before he can get the medicine he is captured by the newly promoted Admiral Zhao and put in Zhao's fortress.Will Aang save Sokka and Katara in time?And who is this strange figure wearing a blue demonic looking mask? Meanwhile, Momo and Appa are chased by rogue swamp dwellers and only Aang and the gang can save them. Meanwhile Zuko and Iroh meet up with a boy named Jet and his freedom fighters. Aang and friends visit a village being terrorized by an angry spirit. Sokka, Suki, and Toph try to stop the Fire Nation's air fleet. After Zuko is taken down protecting Katara from Azula, Katara fights and manages to restrain Azula. Zuko leads the rest of the group to the Earth Kingdom to meet a tracker whom they hope can find Aang. Feeling as though he isn't contributing enough to the group, Sokka seeks out an elusive swordsmaster from whom he can learn the ways of the blade.

It's all about instincts...While traveling towards the North Pole, the group almost gets captured by the Fire Nation. They infiltrate the island and the battle begins. They begin to reminisce on their times in the past while they wait for a message to arrive from their father; in which Aang believes Katara and Sokka will abandon him and go out to find their father should the message arrive.

While on the island, Aang seeks guidance from his past lives, but is not pleased with what he is told.

Two teenage siblings (Sokka and Katara) living in the South Pole discover a very strange boy (Aang), along with his pet flying bison Appa, in an iceberg. When Aang reveals that he is the avatar, news quickly spreads out and suddenly reaches to Prince Zuko who then goes to Kyoshi Island to capture him. When Katara finally decides to participate in this scam to disprove Toph's accusations, they are left vulnerable and are forced to face the dire consequences. However, there was one part of the temple where nobody has been able to enter, and what Aang and his friends discover inside spells oncoming conflict. Aang's destiny hangs in the balance - and so does Zuko's, as Iroh tells him "it is time to choose.".