"Address Lord Zeus, boy," Poseidon told me. "Tell him your story."
So I told Zeus everything, just as it had happened. I took out the metal cylinder, which began sparking in the Sky God's presence, and laid it at his feet.
There was a long silence, broken only by the crackle of the hearth fire.
Zeus opened his palm. The lightning bolt flew into it. As he closed his fist, the metallic points flared with electricity, until he was holding what looked more like the classic thunderbolt, a twenty-foot javelin of arcing, hissing energy that made the hairs on my scalp rise.
"I sense the boy tells the truth," Zeus muttered. "But that Ares would do such a thing ... it is most unlike him."
"He is proud and impulsive," Poseidon said. "It runs in the family."
"Lord?" I asked.
They both said, "Yes?"
"Ares didn't act alone. Someone else—something else— came up with the idea."
I described my dreams, and the feeling I'd had on the beach, that momentary breath of evil that had seemed to stop the world, and made Ares back off from killing me.
"In the dreams," I said, "the voice told me to bring the bolt to the Underworld. Ares hinted that he'd been having dreams, too. I think he was being used, just as I was, to start a war."
"You are accusing Hades, after all?" Zeus asked.
"No," I said. "I mean, Lord Zeus, I've been in the presence of Hades. This feeling on the beach was different. It was the same thing I felt when I got close to that pit. That was the entrance to Tartarus, wasn't it? Something powerful and evil is stirring down there ... something even older than the gods."
Poseidon and Zeus looked at each other. They had a quick, intense discussion in Ancient Greek. I only caught one word. Father.
Poseidon made some kind of suggestion, but Zeus cut him off. Poseidon tried to argue. Zeus held up his hand angrily. "We will speak of this no more," Zeus said. "I must go personally to purify this thunderbolt in the waters of Lemnos, to remove the human taint from its metal."
He rose and looked at me. His expression softened just a fraction of a degree. "You have done me a service, boy. Few heroes could have accomplished as much."
"I had help, sir," I said. "Grover Underwood and Annabeth Chase—"
"To show you my thanks, I shall spare your life. I do not trust you, Perseus Jackson. I do not like what your arrival means for the future of Olympus. But for the sake of peace in the family, I shall let you live."
"Um ... thank you, sir."
"Do not presume to fly again. Do not let me find you here when I return. Otherwise you shall taste this bolt. And it shall be your last sensation."
Thunder shook the palace. With a blinding flash of lightning, Zeus was gone.
I was alone in the throne room with my father. "Your uncle," Poseidon sighed, "has always had a flair for dramatic exits. I think he would've done well as the god of theater."
An uncomfortable silence.
"Sir," I said, "what was in that pit?"
Poseidon regarded me. "Have you not guessed?"
"Kronos," I said. "The king of the Titans."
Even in the throne room of Olympus, far away from Tartarus, the name Kronos darkened the room, made the hearth fire seem not quite so warm on my back.
Poseidon gripped his trident. "In the First War, Percy, Zeus cut our father Kronos into a thousand pieces, just as Kronos had done to his own father, Ouranos. Zeus cast Kronos's remains into the darkest pit of Tartarus. The Titan army was scattered, their mountain fortress on Etna destroyed, their monstrous allies driven to the farthest corners of the earth. And yet Titans cannot die, any more than we gods can. Whatever is left of Kronos is still alive in some hideous way, still conscious in his eternal pain, still hungering for power."
"He's healing," I said. "He's coming back."
Poseidon shook his head. "From time to time, over the eons, Kronos has stirred. He enters men's nightmares and breathes evil thoughts. He wakens restless monsters from the depths. But to suggest he could rise from the pit is another thing."
"That's what he intends, Father. That's what he said."
Poseidon was silent for a long time.
"Lord Zeus has closed discussion on this matter. He will not allow talk of Kronos. You have completed your quest, child. That is all you need to do."
"But—" I stopped myself. Arguing would do no good. It would very possibly anger the only god who I had on my side. "As ... as you wish, Father."
A faint smile played on his lips. "Obedience does not come naturally to you, does it?"
"No ... sir."
"I must take some blame for that, I suppose. The sea does not like to be restrained." He rose to his full height and took up his trident. Then he shimmered and became the size of a regular man, standing directly in front of me. "You must go, child. But first, know that your mother has returned."
I stared at him, completely stunned. "My mother?"
"You will find her at home. Hades sent her when you recovered his helm. Even the Lord of Death pays his debts."
My heart was pounding. I couldn't believe it. "Do you ... would you ..."
I wanted to ask if Poseidon would come with me to see her, but then I realized that was ridiculous. I imagined loading the God of the Sea into a taxi and taking him to the Upper East Side. If he'd wanted to see my mom all these years, he would have. And there was Smelly Gabe to think about.
Poseidon's eyes took on a little sadness. "When you return home, Percy, you must make an important choice. You will find a package waiting in your room."
"A package?"