{Hazel's POV}

"What's going on?" Frank asked, slamming the truck door.

"Guys, meet Quinn Candace Hartley, daughter of Apollo," Piper gestured at Quinn, the girl we thought had hurt our friends.

"What?" Nico asked.

"Long story short, Gaea created a new monster during the war: The Shapeshifter. It's coming to camp and stealing powers. Has anything happened to you I should know about?" Quinn explained.

"Well...Katie went missing at one point," Connor pointed out.

"Where'd you go? What do you remember?" Quinn inquired.

"I...I was in this cave thing, and Kianna was there-" Katie was cut off by Quinn.

"Kianna? Kianna, that mean girl? Who hangs out with Sarabella? She has absolutely nothing to do with the demigod world! It must've been-"

"You mean The Shapeshifter has watched us for months now?" Annabeth asked, shocked.

"He must've. Anything else?"

"Octavian came back not too long ago," I pointed out, "and he died. And he was kind of nice to us."

"So The Shapeshifter gave that love potion to Percy?" Jason asked.

"And gave the information to Dallas and the others?" Chris added.

"I guess so. Anything else? And go faster, Percy!" Quinn exclaimed.

"I'm not breaking the speed limit!" Percy yelled from the front.

"Since when do you care?" Annabeth rolled her eyes. "Remember when Travis told you that-"

"I'd like to not  remember that!" Percy yelled.

"Everyone shut up!" Nico yelped. "Quinn, have you had any dreams like us?"

"Dreams?" she shrieked. "1, you should've told me earlier! 2, I'd barely call them dreams, they're hell. Oops, sorry guys," Quinn gestured towards Percy and Annabeth who shrugged it off awkwardly.

"I have a friends at Hypnos Cabin: you may know Addy Charleston and James Darian? They could interpret those dreams," Quinn explained.

"But what about yours? What happened in them?" Calypso asked.

"Dreams about...my past. Uh, Rionach and Rhiannon McNealy? You might remember them, they were daughters of Tyche. Rionach was supposedly killed by the Shapeshifter during the Giant War...Rhiannon went missing right after. They were my best friends...I'd always had nightmares about their disappearances, but now more than recently. Rio wouldn't want that...she always said that if she died young we'd better not worry about her because she'd come out of Elysium and kill us herself. She hasn't shown up yet," she awkwardly laughed.

"I made so many good memories with them. There was this one time Rhia brought me and Rio to..." Quinn trailed off, and her eyes grew wide.

"Quinn? Earth to Quinn! Did you just like, die or somethin'?" Leo asked.

"Rhia called the work shed Figura verso Mysterio, and that means-"

"Shape Changer Mystery," I completed. "How do you know Latin?"

"My Roman siblings taught me a little," Quinn answered quickly. "But...Shape Changer Mystery...how..?"

"Did Rhiannon know about the Shapeshifter?" Jason asked.

"No! There's no way she could've known."

"Well..." Piper awkwardly started, "there is a way she could know."

"Rhia wasn't on Gaea's side," Quin argued.

"I'm not saying she was ," Piper scooted away from her, "I'm saying it's...a possibility."

"How else would she know about the work shed?" Thalia asked.

"Sh-she could know in other ways..." Quinn protested. A few of them looked at her sternly.

"Okay," Quinn breathed, tears in her eyes, "there was a few times I questioned if Rhia was on Gaea's side before she went missing."

"What other proof do you have?" Annabeth asked.

"Well," Quinn started, "there was that time she went missing during an entire battle. Or when Rio died, she seemed...different than she should've been when a sibling dies. I-I don't know!"

"Quinn, calm down, we're almost to camp, okay?" Percy called from the front.

"What about Rionach? Did she act strange?" I asked.

"I don't think so," she sniffed, "personally."

"So. The mystery of Rhiannon McNealy," Leo crossed his arms, and Piper slapped one.

"Yeah, what could've happened?" Katie asked.

"We're about to maybe get close. Here's camp," Percy said, pulling up. The bright orange banner hadn't changed, and the camp was still orderly, even if many campers were dying.

"Do you know who we should go to?" Annabeth asked.

"I just wanna go see my siblings right now," Quinn whimpered. "And my friends."

"I agree!" everyone answered, and we ran outside.