Prologue:
Zuko and Aang stood back to back, surrounded by rogue firebenders.
"Why does this happen everywhere we go?" Zuko shouted as he knocked a blast aside.
"Maybe if you weren't so anti-social—" Aang returned, bending a wall of earth to defend them from a flame.
"Anti-social?" Zuko asked. "Mai likes me!"
"And I've never figured out exactly what she sees in you."
"Eh, my guess would be either stupidity or hard-headedness."
"Sokka!" shouted Aang.
"Stupidity and hard-headedness are the same thing," Katara admonished her brother.
"No, there's a major difference which will occur to me in time," Sokka replied. "For now, let's smash some heads."
The two groups began working in tandem. Zuko and Katara whipped up a smokescreen (or, to be more accurate, steam-screen), and Sokka and Aang used it's cover to knock down firebender after firebender.
"We're winning!" shouted Aang. "Let's go!" Zuko stared at him as cracks began to spread across his face. He spun around to see Katara and Sokka begin to do the same. Suddenly, the world exploded as someone roared with laughter. A scream rent…
…The air. Zuko was up and down the corridor in a flash. He threw the door open, preparing to roast someone alive.
"Zuko," his mother commanded him, "it's all right." She stroked his eleven-year-old sister's hair. Azula was weeping softly.
She should be fifteen or sixte—
Zuko shook his head to clear it. Some of that weird dream must have been hanging around still. He turned and walked out.
"What's going on?" shouted Lu Ten, charging toward him.
"Nothing," replied Zuko. "Azula just had the dream again."
Lu Ten straitened, and shrugged. "Oh, well if that's all." He turned away.
Zuko stiffened as shock invaded his system, along with the feeling that he shouldn't have had that exchange somehow. He inhaled, allowed the sound of the ocean to wash over him.
Back in his room, Zuko sat on the bed. He ran his hand over his left eye. He'd had a scar there, it the dream. He didn't know why. He leaned back, and dropped onto his bed.
"Tomorrow morning, first thing," he promised himself, "I'm going to talk to Uncle Iroh and find something out about what's wrong with my head." He stood, and looked out the porthole.
"And what's wrong around here. Why am I having these dreams?"