"Twin giants, like Piper saw in her blade..." Annabeth ran her finger along the rim of her cup. "I remember a story about twin giants. They tried to reach Mount Olympus by piling up a bunch of mountains."

Frank nearly choked. "Well, that's great. Giants who can use mountains like building blocks. And you say Bacchus killed these guys with a pinecone on a stick?"

"Something like that," Percy said. "I don't think we should count on his help this time. He wanted a tribute, and he made it pretty clear it would be a tribute we couldn't handle."

Silence fell around the table. Piper could hear Coach Hedge above deck singing "Blow the Man Down," except he didn't know the lyrics, so he mostly sang, "Blah-blah-hum-de-dum-dum."

Piper couldn't shake the feeling that Bacchus was meant to help them. The giant twins were in Rome. They were keeping something the demigods needed-something in that bronze jar. Whatever it was, she got the feeling it held the answer to sealing the Doors of Death-the key to endless death. She also felt sure they could never defeat the giants without Bacchus's help. And if they couldn't do that in five days, Rome would be destroyed, and Hazel's brother, Nico, would die.

On the other hand, if the vision of Bacchus offering her a silver goblet was false, maybe the other visions didn't have to come true either-especially the one of her, Percy, and Jason drowning. Maybe that was just symbolic.

The blood of a female demigod, Gaea had said, and the blood of a male. Piper, my dear, choose which hero will die with you.

"She wants two of us," Piper murmured.

Everyone turned to look at her.

Piper hated being the center of attention. Maybe that was strange for a child of Aphrodite, but she'd watched her dad, the movie star, deal with fame for years. She remembered when Aphrodite had claimed her at the bonfire in front of the entire camp, zapping her with a magic beauty-queen makeover. That had been the most embarrassing moment of her life. Even here, with only six other demigods, Piper felt exposed.

They're my friends, she told herself. It's okay.

But she had a strange feeling...as if more than six sets of eyes were watching her.

"Today on the highway," she said, "Gaea told me that she needed the blood of only two demigods-one female, one male. She-she asked me to choose which boy would die."

Jason squeezed her hand. "But neither of us died. You saved us."

"I know. It's just...Why would she want that?"

Leo whistled softly. "Guys, remember at the Wolf House? Our favorite ice princess, Khione? She talked about spilling Jason's blood, how it would taint the place for generations. Maybe demigod blood has some kind of power."

"Oh..." Percy set down his third pizza slice. He leaned back and stared at nothing, as if the horse kick to his head had just now registered.

"Percy?" Annabeth gripped his arm.

"Oh, bad," he muttered. "Bad. Bad." He looked across the table at Frank and Hazel. "You guys remember Polybotes?"

"The giant who invaded Camp Jupiter," Hazel said. "The anti-Poseidon you whacked in the head with a Terminus statue. Yes, I think I remember."

"I had a dream," Percy said, "when we were flying to Alaska. Polybotes was talking to the gorgons, and he said-he said he wanted me taken prisoner, not killed. He said: 'I want that one chained at my feet, so I can kill him when the time is ripe. His blood shall water the stones of Mount Olympus and wake Earth Mother!'"

Piper wondered if the room's temperature controls were broken, because suddenly she couldn't stop shaking. It was the same way she'd felt on the highway outside Topeka. "You think the giants would use our blood...the blood of two of us-"

"I don't know," Percy said. "But until we figure it out, I suggest we all try to avoid getting captured."

Jason grunted. "That I agree with."

"But how do we figure it out?" Hazel asked. "The Mark of Athena, the twins, Ella's prophecy...how does it all fit together?"

Annabeth pressed her hands against the edge of the table. "Piper, you told Leo to set our course for Atlanta."

"Right," Piper said. "Bacchus told us we should seek out...what was his name?"

"Phorcys," Percy said.

Annabeth looked surprised, like she wasn't used to her boyfriend having the answers. "You know him?"

Percy shrugged. "I didn't recognize the name at first. Then Bacchus mentioned salt water, and it rang a bell. Phorcys is an old sea god from before my dad's time. Never met him, but supposedly he's a son of Gaea. I still don't understand what a sea god would be doing in Atlanta."

Leo snorted. "What's a wine god doing in Kansas? Gods are weird. Anyway, we should reach Atlanta by noon tomorrow, unless something else goes wrong."

"Don't even say that," Annabeth muttered. "It's getting late. We should all get some sleep."

"Wait," Piper said.

Once more, everyone looked at her.

She was rapidly losing her courage, wondering if her instincts were wrong, but she forced herself to speak.

"There's one last thing," she said. "The eidolons-the possessing spirits. They're still here, in this room."

Piper couldn't explain how she knew.

Stories of phantoms and tortured souls had always freaked her out. Her dad used to joke about Grandpa Tom's Cherokee legends from back on the rez, but even at home in their big Malibu mansion, looking out over the Pacific, whenever her dad recounted the ghost stories for her, she could never get them out of her head.

Cherokee spirits were always restless. They often lost their way to the Land of the Dead, or stayed behind with the living out of sheer stubbornness. Sometimes they didn't even realize they were dead.

The more Piper learned about being a demigod, the more convinced she was that Cherokee legends and Greek myths weren't so different. These eidolons acted a lot like the spirits in her dad's stories.

Piper had a gut sense they were still present, simply because no one had told them to go away.

When she was done explaining, the others looked at her uncomfortably. Up on deck, Hedge sang something that sounded like "In the Navy" while Blackjack stomped his hooves, whinnying in protest.

Finally Hazel exhaled. "Piper is right."

"How can you be sure?" Annabeth asked.

"I've met eidolons," Hazel said. "In the Underworld, when I was...you know."

Dead.

Piper had forgotten that Hazel was a second-timer. In her own way, Hazel too was a ghost reborn.

"So..." Frank rubbed his hand across his buzz-cut hair as if some ghosts might have invaded his scalp. "You think these things are lurking on the ship, or-"

"Possibly lurking inside some of us," Piper said. "We don't know."

Jason clenched his fist. "If that's true-"

"We have to take steps," Piper said. "I think I can do this."

"Do what?" Percy asked.

"Just listen, okay?" Piper took a deep breath. "Everybody listen."

Piper met their eyes, one person at a time.

"Eidolons," she said, using her charmspeak, "raise your hands."

There was tense silence.

Leo laughed nervously. "Did you really think that was going to-?"

His voice died. His face went slack. He raised his hand.

Jason and Percy did the same. Their eyes had turned glassy and gold. Hazel caught her breath. Next to Leo, Frank scrambled out of his chair and put his back against the wall.

"Oh, gods." Annabeth looked at Piper imploringly. "Can you cure them?"

Piper wanted to whimper and hide under the table, but she had to help Jason. She couldn't believe she'd held hands with...No, she refused to think about it.

She focused on Leo because he was the least intimidating.

"Are there more of you on this ship?" she asked.

"No," Leo said in a hollow voice. "The Earth Mother sent three. The strongest, the best. We will live again."

"Not here, you won't," Piper growled. "All three of you, listen carefully."

Jason and Percy turned toward her. Those gold eyes were unnerving, but seeing all three boys like that fueled Piper's anger.

"You will leave those bodies," she commanded.

"No," Percy said.

Leo let out a soft hiss. "We must live."

Frank fumbled for his bow. "Mars Almighty, that's creepy! Get out of here, spirits! Leave our friends alone!"

Leo turned toward him. "You cannot command us, child of war. Your own life is fragile. Your soul could burn at any moment."

Piper wasn't sure what that meant, but Frank staggered like he'd been punched in the gut. He drew an arrow, his hands shaking. "I-I've faced down worse things than you. If you want a fight-"

"Frank, don't." Hazel rose.

Next to her, Jason drew his sword.

"Stop!" Piper ordered, but her voice quavered. She was rapidly losing faith in her plan. She'd made the eidolons appear, but what now? If she couldn't persuade them to leave, any bloodshed would be her fault. In the back of her mind, she could almost hear Gaea laughing.

"Listen to Piper." Hazel pointed at Jason's sword. The gold blade seemed to grow heavy in his hand. It clunked to the table and Jason sank back into his chair.

Percy growled in a very un-Percy-like way. "Daughter of Pluto, you may control gems and metals. You do not control the dead."

Annabeth reached toward him as if to restrain him, but Hazel waved her off.

"Listen, eidolons," Hazel said sternly, "you do not belong here. I may not command you, but Piper does. Obey her."

She turned toward Piper, her expression clear: Try again. You can do this.

Piper mustered all her courage. She looked straight at Jason-straight into the eyes of the thing that was controlling him. "You will leave those bodies," Piper repeated, even more forcefully.

Jason's face tightened. His forehead beaded with sweat. "We-we will leave these bodies."

"You will vow on the River Styx never to return to this ship," Piper continued, "and never to possess any member of this crew."

Leo and Percy both hissed in protest.

"You will promise on the River Styx," Piper insisted.

A moment of tension-she could feel their wills fighting against hers. Then all three eidolons spoke in unison: "We promise on the River Styx."

"You are dead," Piper said.

"We are dead," they agreed.

"Now, leave."

All three boys slumped forward. Percy fell face-first into his pizza.

"Percy!" Annabeth grabbed him.

Piper and Hazel caught Jason's arms as he slipped out of his chair.

Leo wasn't so lucky. He fell toward Frank, who made no attempt to intercept him. Leo hit the floor.

"Ow!" he groaned.

"Are you all right?" Hazel asked.

Leo pulled himself up. He had a piece of spaghetti in the shape of a 3 stuck to his forehead. "Did it work?"

"It worked," Piper said, feeling pretty sure she was right. "I don't think they'll be back."

Jason blinked. "Does that mean I can stop getting head injuries now?"

Piper laughed, exhaling all her nervousness. "Come on, Lightning Boy. Let's get you some fresh air."

Piper and Jason walked back and forth along the deck. Jason was still wobbly, so Piper encouraged him to wrap his arm around her for support.