The four quest members had woken up early the day of their departure. Argus drove them down to Tennessee (fast driver). On the way, the only people really talking were Percy and Annabeth.

Percy: Do you think pigeons have feelings?

Annabeth: Why would you ask that?

Percy: 'Cause those pigeons seem to be fighting.

Annabeth: I suppose so.

Percy: I have a problem.

Annabeth: Yes?

Percy: I seem to think everything is an option.

Annabeth: Was our relationship an option?

Percy: Yes.

Annabeth: PERCY.

Percy: And it was the best choice I made.

Annabeth: Aww I love you!

Percy: I love you too, Wise Girl!

Nico couldn't handle it. He just stayed quiet, glad he couldn't interfere (he was sitting in the passenger seat). Helia had too much on her mind to be paying attention.

Finally, she spoke up. "I know who that man was who told me to warn the camp."

Percy and Annabeth stopped talking and the three of them looked at her.

"It was my father. Last night I dreamt of him and he told me that he was sorry we had to do all this. Especially you three, because you have been through too much already. He also told me that the next time we meet, whether in real life or in another dream, he will tell me who the villain is, who the one starting the war is and why."

They were silent for the rest of the trip. Helia looked outside her window as they were passing by towns.

They reached mid-Tennessee at night. Argus drove back and they decided to camp out for the night, since they were in the middle of nowhere.

"I'll take first watch," Helia said as they were setting up their camping area. Nobody objected; they were all exhausted.

Helia walked over to the side and sat down, thinking. After everyone had settled, Percy walked over and sat down next to her.

"Hey, sorry for acting weird before. I was just frustrated that we have to go through another war," Percy said quietly.

"It's okay, I understand," said Helia. She was gazing into the darkness.

"Is-is it okay if I ask you a favor?"

"Yeah, go ahead."

"I know this might refer to the 'impossible vow', but... if I'm the one to die... will you make sure Nico and Annabeth are safe? Can you protect them?"

Helia was silent. An eerie wind blew her hair around.

"I-I know that Annabeth would not want to be alive when I'm dead, and Nico.. he's been through some pretty tough times. So please..." Percy looked at her desperately.

"I promise I will protect them," Helia whispered. Percy breathed a sigh of relief.

"Thank you so much." He made his way back to the others.

The impossible vows must be made.

"I swear that I will protect all three of you," Helia whispered into the wind. "I swear it on the River Styx."

A/N: Short chapter, I know, but I had to write something! Big surprises coming up, lemme tell you that. No spoilers. :)