Sakura tried to sneak out, but Aang had been too worried to sleep and followed her. So she found him some black out gear and let him come with.
"I think someone's following us." Aang whispered.
"I know." Sakura said softly. "The masked guy's been following us for a while."
"The Blue Spirit." Aang breathed.
"What's that?" Sakura said, opening up Lake Laogai.
"He helps us sometimes. He's a good guy." Aang reassured her.
The two managed to find their way to Appa, only to find the Blue Spirit releasing the chains. He looked like he wanted to fight, then seemed to war with himself, and ran outside.
"I'll keep watch," He said. "You get Appa."
"He knows way too much." Sakura said suspiciously.
"I'm telling you." Aang finished freeing Appa. "He's a good guy."
They got on Appa's back and flew out of the city. They'd agreed to keep Appa a secret from Ba Sing Se until they could find someone to trust.
As they flew over Lake Laogai, Sakura watched the Blue Spirit arguing with an older man. He took off the mask, and she saw his scar.
Could he be the Prince Zuko that had hunted Aang all this time? And Aang thought he was a friend?
Sakura would find out.
That was for sure. Cha!