This is my first story so please comment. Also this happens after Gaea is defeated and before the fire king's defeat.

Disclaimer: I do not own PJO, HOO, or Avatar: The Last Airbender.

Chapter 1

Directly after Dinner Percy, Annabeth, Leo, Hazel, and Jason met up in front of Percy's cabin.

"Where's piper and frank?" Annabeth asked Percy while taking a seat next to him on the stairs leading up to the cabin "I thought you invited all seven of us. Or did seaweed brain forget someone?"

"No I did not forget anyone. They both said they had stuff to do." He responded with a hint of irritation. And he guided everyone to a small campfire, with logs to sit on and a pile of wood in the center, on the beach. "Leo, would you mind lighting a fire?"

Leo shot fire from his palm at the pile of wood it the middle of the logs

"Why are we here again?" Jason wondered aloud

"Cuz its Annie Bells birthday" Percy said teasingly receiving an elbow to the ribs from annabeth.

"I TOLD YOU NOT TO CALL ME THAT!" was what she was about to say when a green glow came from behind leo. Everyone turned to see what it was. Directly behind Leo was a swirling green circle outlined with purple. All of a sudden a voice boomed above

"Five people need your help they are not of this world but a similar one. Some of those in our world have found this place and plan to invade it. This portal should take you to them."

"What was that?" Leo questioned "And should?!

"I don't know but if a god wants us to do something we ought to do it" Annabeth said "and if Athena helped it will work."

"And if she didn't?"

Annabeth just simply shrugged. While Leo was completely freaked but didn't want to have an argument with Annabeth.

"What if it's a trap?" Hazel asked as much as she wanted to help these people she just got back from her last quest.

"What if it's not? I say we go plus, we could totally take 'em if it is." Jason added

"Oh and Percy take Blackjack" the voice boomed again

"Wait why?" Percy asked but got no response. Percy whistled for Blackjack and climbed on his back.

Hey boss got any sugar cubes

"No"

How about donuts boss?

"Blackjack we kind of have a situation at the moment so if you wouldn't mind."

Oh ok so that's a no about the donuts?

"NO"

And with that they walked through the green portal.