Guys i dont own the PJO characters just this plot, Also this is my first PJO fan fic so comments and reviews are very welcome. The story takes place after the events of the lightning and well things are a bit different than from what you know, the first big change is that Sally died giving birth to Percy. I had this idea because then Percy would be raise by Poseidon but things are not what they seem. Well i hope you like it and review.

Chapter 1

Temple of Athena, Mount Olympus

Athena the goddess of wisdom arrive at her temple and found something unexpected, her uncle and rival Poseidon standing to the side watching an Iris-message of her youngest daughter Annabeth and her father. He had a strange look on his face it was a look she knew well for it was a look he got when he was trying to hide something, but his eyes told a different story there was pain and grief in his gaze.

"To what I owe this unexpected…visit Poseidon." There she could be civilized and didn't called him fish-face.

Poseidon watched a little longer the Irish message before turning to her. "Athena we need to talk…but before I say anything swear on the river Styx that what I say to you stays in this room and it doesn't go beyond it, swear it by the Styx and your children."

Athena was a bit shock about the request this isn't like Poseidon at all, and more he didn't insult her or anything. "And why should I swear to those terms, what are you hiding, seaweed beard?"

Poseidon looked at her in thought. "Because what I'm about to reveal is sensitive information and you would be the only other person who knows it." He gave her a bitter smile. "Think about it this way I'm about to give you information you can later use against me."

And that is why he was her greatest rival he thought along the same lines as she did always thinking two or even three steps ahead. But now she picked her curiosity.

"Ok Poseidon, I swear on the river Styx and the memory of the people of Athens that I won't reveal any information your about to reveal to me."

Poseidon took a deep breath knowing he might come to regret this decision but he needed help and he won't let his pride cost an innocent life. He put his hand on her shoulder and transported them to an island on the Sea of Monsters, there he walk her to a temple he had made that week.
The temple was not huge but it was big and it was made entirely out of coral with bright colors and the scent of the sea, the ceilings were high enough for a god in his natural height and the space was big, but what called his attention was aim the cries of a baby.

Athena was impressed by the construction of the temple but what struck her odd was why Poseidon would build a temple in an island in the middle of nowhere right in the center of the freaking Sea of Monsters.

But she got her answers when she heard the cries of a baby and her mind started coming up with ideas just as Poseidon led her inside the temple, the grief in Poseidon's eyes and how he was so temperamental last week he caused a major tsunami none of the gods knew the reason and in the mood he was in no one not even her father wanted to approach the lord of the seas.

But when she saw the Nereids taking care of a little baby boy she whirled to Poseidon anger in her eyes. "How could you? You broke the sacred oath?!" She all but scream she wasn't that mad that Poseidon had broken his vow but that he made her promise not to tell.

Poseidon looked at her eyes full of pain and grief and when he spoke there was so much pain in his voice it broke her heart.

"I know Athena, I broke the vow just like my brother." He looked at the boy and smile his eyes filled with love and pride he went to the Nereids and took the child in his hands. The boy had black hair and sea green eyes just like his father. "Athena you know how my brothers are Zeus killed Hades last human lover and a whole building full of mortals, and you know what Hades did to Zeus child if any of them found out about Percy he will not survive and I can't take him to Atlantis with me because of Amphitrite would throw a fit."

Athena knew all that she had witness just how much angry her father and uncle would be at Poseidon for breaking his vow and the only one who would pay would be the child.

"Percy? As in Perseus, just like my late half-brother? But Poseidon where is the mother?"

She already suspected what had happen to her but she needed to hear it from him she needed all the facts.

Poseidon's eyes turn misty with tears he dismissed the Nereids and put the baby in a crib where the baby slept happily.

"Her name was Sally Jackson and she died hours after Percy was born she was the one who name him like that, like you said I broke the vow and the river Styx took her the labor was too much the Nereids try to do everything but in the end she died."

Athena looked at Poseidon and noticed the mountain of grief and sorrow that was in the god of the seas voice yet she couldn't help feel sorry for her rival. "You're an arrogant prideful stupid seaweed beard fine so what do you want me to do, I figure you brought me here for a reason."

Poseidon looked as he had swallowed something really bitter. He started speaking several times but couldn't get the words out whatever it was must be really big, and then he looked at the baby and seemed to draw strength from him. "I want your help raising Percy…I'm going to build him a house here on this island that way my brothers won't be able to find him the sea is my domain and I'll hide this island from there sight but you know the prophecy if Percy is the hero his going to need training and who better to train him than you? I could ask Ares but that boar-headed idiot would just teach him to bash his enemies with a sword." Poseidon smiled.

"I get the feeling my Percy won't need that but what he really needs is for someone to give him the knowledge of the reasons of why he must pick up his sword and how he can use his abilities to maximum and there's only one goddess that fits the billed and that's you Athena so will you help me."

Athena was speechless and that didn't happen many often she could count the number of times it had happen with one hand and still have fingers to spare. What Poseidon ask of her was more than she could think of right at this moment.

How can he as her to train a hero since birth he must be crazy, then again he always had a screw loose in that plankton head of his. "You are crazy for even suggesting such a hair brain and I must be crazy for even thinking about accepting this..." She took a deep breath. "Fine I'll do it but not a word of this to anyone." Then she disappeared in a pillar of fire.

Poseidon rolled his eyes at the dramatics, she definitely got that from Zeus, Fates know that man is more dramatic than a Korean soap-opera. Just as Poseidon was turning around to check on his son, another pillar of fire appear in the temple this one more tame and warm he smile knowing who it was but he didn't like that she was here.

"Hestia, sister why have you come here?" He said no use trying to shield Percy since Hestia probably knew about him and that's why she was here.

Hestia appear as a young woman in front of him and she looked concern, she looked at Percy then at Poseidon and she came and hug him. "I'm sorry Poseidon; I know this must be a difficult time for you."

Poseidon hug his sister hard, he let his grief out and pain in a soundless scream as the proud god of the seas cried for the woman who had wormed her way into his heart and now has left both him and his son after he let his grief out he sent a silent thank you to his sister.
"How did you know?"

Hestia smiled at him and went to Percy and pick him up, the baby was sleeping peacefully. "Brother I'm the goddess of the hearth, there is little that happens in the family that I don't know, and believe me sometimes I don't want to know. And I overheard you and Athena talking."

Poseidon smiled when he saw Hestia picking up Percy. "So are you going to yell at me too or should we skip that and head to the hitting?"

Hestia glared at him "I should hit for saying that boy, Fates I swear you and Zeus are just as bad and no Poseidon I'm not leaving Hades out of it either." Her eyes soften then she looked at Percy.

"Your right about what you said to Athena however this boy is going to need more than just training, and I'm not saying you won't love him Poseidon but every child needs a mother's love and nothing against Athena but she might train the boy's mind and body but his soul and heart would be just like any of the other gods"

Poseidon wanted to deny her but there was a reason why demigods were raise by the mortal parents so that they can nurture the humanity in them.

Poseidon looked at the sea. "But what can I do Hestia?"

Hestia smiled. "Simple brother let me be the boy's mother you can be the fatherly figure and train him on how to use his powers while Athena trains the boy's mind and body and let me worry about his welfare."

Poseidon was stunned by the offer. "Why?"

Hestia gave a sad smile. "My last children died about a year ago and no mortal has caught my fancy and look at him Poseidon who can say no to that face."

Poseidon smiled and it seem like a weight was lifted from his shoulders. "Thank you sister, ok will do that."