The young waterbender couldn't stop crying. Why would she? Someone had taken her brother hostage, and she didn't even know who.

Aang quietly let her cry on his shoulder, without saying a word. He too was worried for Sokka's safety. After a while, he finally said, "Don't worry, Katara. We're going to find him."

She took in a deep breath and replied, "How are we going to do that when we don't even know where he is? We don't even know who took him!"

"Maybe not, but I think we're one step closer." Katara spun around to see a figure holding a piece of parchment walk towards them, coming from the glass doors that led to the balcony where she and Aang had been. So was the nature of the Fire Nation palace. "I got this note in my room this morning," the young Firelord had told them.

Katara looked at Zuko with a worried expression. "Who's is from?"

He shook his head. "I don't know. It's not signed."

Her worry quickly turned into anger and frustration. "Well how does that help?"

"Katara," Aang said as he came to her side, putting his hand on her shoulder. "I know you're upset, but yelling at Zuko isn't going to help Sokka."

She took in a deep breath, and let it out slowly. "You're right. I'm sorry, Zuko. I guess I'm just nervous…"

Zuko nodded, "I understand. Don't worry, Katara, we'll find him. I promise."

The young waterbender smiled. "Thank you."

"This note isn't signed, but it gives instructions on where to meet Sokka's kidnappers," he said as he gave the note to Katara.

Her eyes widened as she read, I am holding your brother at the Boiling Rock. Bring the Avatar if you wished to see him unharmed.

"Who do you think it is?" Aang had asked after Katara read the note.

"Not sure," Zuko replied. After the war ended, you don't have very many enemies left. The only people I can think of are my father, and Azula, but they're both in prison."

"What if one of them has people on the outside?" Katara said. "Like, spies that are still loyal to them or something?"

"I guess that's possible…" Zuko responded.

"Wait, you said they were in prison, right?" Aang said. "Where exactly are they?"

"They should be in the prison here in the Fire Nation," he replied.

"So, it's not possible they're at the Boiling Rock?" Katara asked.

Zuko shook his head. "Not unless they escaped, which I highly doubt is possible."

"Didn't your uncle escape from prison, though?"

"That's…true," he hesitated. "But that was my uncle. He's different from my father, or Azula.

Katara sighed. "If something happens to Sokka, I… I'll never forgive myself." She pressed her face in her hands as fresh tears fell from her eyes.

"It's not your fault, Katara…" Aang said gently, in an attempt to comfort her. "He was taken in the middle of the night. No one could've done anything."

"But he's been gone for almost a week! What if he got hurt? Or what if he…" she tightly hugged Aang before she could finish, more tears flowing down her face.

He gently held her, still trying to comfort her. "I'm sure he's fine," he said gently. "Sokka's strong."

"I'm going to go check with the prison guards," Zuko said, and started to walk away.

"Wait, we'll go with you," Katara said after a moment of composing herself.

He simply nodded and walked off again, with Aang and Katara following him.