Falling, Fallen

Chapter 1: Destiny

"We've got to find Sokka and Toph." Katara breathes just as blue fire attacks them from behind. Aang stops it using earthbending, but the impact forces him backward a few steps. Azula, the source of the blast, with smoke trailing from her fingertips. Katara uses waterbending to stop another attack, then sends a wave crashing toward Azula, who vaporizes the water with firebending. The mist from the vaporized water allows Azula to jump onto a crystal and firebend two blasts of blue fire. Together, Aang and Katara use waterbending to stop the blasts. Azula finishes her jump by landing on a rock pillar. Aang uses earthbending on the pillar, and Azula gasps once she notices the pillar crumbling. She jumps off and lands between Katara and Aang. She points at both of them, preparing to attack or defend herself.
An orange fire blast lands in the middle of the standoff, and they look to see the source of the fire blast to be Zuko. Zuko looks from Azula to Katara and Aang, choosing who to attack. Katara looks at him hopeful who he looks at Azula, she is glaring back at him. He then looks at Aang, who gasps once he realizes Zuko will attack him. Zuko firebends at him, and Aang uses airbending to jump away from the blast. Azula smiles at this and starts dueling with Katara, and Zuko furiously throws multiple fire blasts at Aang. Aang airbends the air currents around him to make a human-shaped gust of air at Zuko, knocking him down. Aang attacks Zuko with more airbending, but Zuko maneuvers around the attacks and gets back up on his feet. He fires more blasts at Aang who is clinging on to a rock pillar. Aang jumps onto a clump of crystals to avoid the attack. Furious, Zuko summons a greater blast of fire. Aang earthbends some crystals to protect him, but the crystals shatter, sending Aang flying to another clump of crystals. Zuko uses fire whips to attack Aang once again, but Aang jumps to another patch of crystals and Zuko keeps attacking.
Azula landing on a puddle of water running toward Katara, who sends a aharp wave of water at Azula that very nearly hits her face, but cuts her hair instead, startling her.
Zuko, who is still using his fire whips to attack Aang, who is now jumping along the cave's ceiling. Aang kicks down a stalactite and follows it, using earthbending to increase its impact and sending Zuko flying, bouncing off the ground into a small wall of crystals. The scene focuses on Azula and Katara. Katara waterbends at Azula, knocking her down. Azula slowly gets back up into a fighting stance as Katara encases herself in water. One water tentacle captures Azula's hand as she struggles to attack her, and another one captures her foot after another failed attack. Katara then lifts Azula up, who yells in fear. Zuko frees his sister using firebending to break the tentacles. Azula gets up and briefly smiles at Zuko in gratitude, then looks toward the crater Aang had created with the stalactite. Aang crawls out, exhausted. Azula runs toward Aang.
Zuko and Katara start fighting. Katara still has water whips on her hands and Zuko starts using his fire whips.
"I thought you had changed!" She grunts. "I have changed." He hissed. Zuko fires another blast.
Azula uses firebending to charge at Aang. Aang earthbends crystals around him into a crystal encased armor and charges at Azula. Azula stops, and uses her firebending to break Aang's crystal armor and send him flying back into an old building.
Now both Zuko and Azula are fighting Katara. Hopelessly outnumbered, Katara gets knocked down. Aang jumps from the old building and earth surfs toward Zuko and Azula to stop them from attacking Katara, with a fiercely determined look on his face. However, a Dai Li agent appears and jumps in front of Aang's surf, sending him flying off. Aang yells as he falls. More Dai Li agents gather behind Zuko and Azula. Katara starts regaining her focus and Dai Li agents surround her. Katara uses the octopus form to defend herself. Aang stands up in a fighting stance, but his determined face quickly turns into one of despair.
"There's too many." Aang signs breathlessly. He looks at Katara. Suddenly he remembered Pathik. "The only way is to let her go"
"I'm sorry, Katara." Aang whispers. Closing his eyes, he turns away from Azula and Zuko and earthbends a crystal shelter tent. Aang starts meditating. Aang enters the Avatar State and the crystal shelter starts glowing, alerting those outside. Aang opens his glowing eyes and breaks the crystal above him. But before Aang can let Katara go and control the Avatar State, a bolt of lightning strikes him in the back. Azula, smiling menacingly her fingers smoking. As Aang falls down, Katara, tears now falling down her face, creates a wave to catch Aang. The wave knocks down the Dai Li agents and Zuko. She looks down at Aang's lifeless body and back up with tears in her eyes. Zuko and Azula prepare to attack Katara, but a blast of fire stops them. Iroh, the source of the blast, jumps down from the wall of the cave and shields Aang and Katara from Zuko and Azula.
"You've got to get out of here! I'll hold them off as long as I can!" Iroh yells to Katara as he fires some blasts at Zuko and Azula.
Katara walks away slowly with Aang's body to a waterfall, and she uses waterbending to lift herself and Aang's body up its path. Iroh holds off the Dai Li agents, taking blows of earthbending, until after Aang and Katara leave. He submits to the Dai Li, who use earthbending to encase him in crystals. Azula is triumphantly smirking next to Zuko, both looking at Iroh. Iroh is looking back at Zuko, then closes his eyes and turns away. "I want the Avatars body." Azula yells.
An injured Toph and Sokka meet Aang, and Katara by Appa. Appa moans sadly at the sight of him. Katara places Aang's body on Appa. She opens the vial around her neck and uses water healing on Aang's wounded back. The rest of Team Avatar, Kuei, and Bosco all look sadly and in anticipation. The glowing from the spirit water stops, and Katara starts crying, assuming that it was not enough to save Aang. Aang's tattoos glow for a second and Aang groans. Katara, overcome with joy that Aang is alive, looks at him, who smiles a little, and she holds him closer.
Then just as they are about to take off they get attacked by more Dia Li.
"I'll hold them off get." Katara shouts as she starts fighting off the agents. "Katara no!" Sokka yells. "There's no time! Get him somewhere safe." She calls over her shoulder. "Sokka please!" Reluctantly the rest of the team leave on Appa.
"We've done it, Zuko. It's taken a hundred years, but the Fire Nation has conquered Ba Sing Se." Azula smiles. "I betrayed Uncle." Zuko whispers." No, he betrayed you. Zuko, when you return home, Father will welcome you as a war hero." "But I don't have the Avatar. What if Father doesn't restore my honor?" "He doesn't need to, Zuko." She says as puts a hand on Zuko's shoulder." Today, you restored your own honor." Zuko looks turns away, uncertain of himself. "Now before I forget I have a present for you. For your success." Azula smiles clapping her hands. The Dia Li bring out a bruised and exhausted looking Katara hands bound. "Your one personal prisoner of war to do with as you please."