It was the night of the 18th when the echo occurred.

The month of February had been pretty great for Sally Jackson. But, being a single mother with a new born of just six months, it was expected something had to go wrong at some stage. However this month in particular had just felt particularly magical.

She was able to start her writing career and she had finally settled into motherhood, and honestly, it had been the best six months of her life.

Though she knew it wouldn't last. She knew the hardships that her son would soon have to endure. She knew that being a demigod was not going to be easy, but she promised that she would be with him every step of the way. She promised that she would protect him no matter what happened. Sally knew she would even die for him.

But what she didn't know was that she was going to do it so soon.

Sam Winchester sat in the back of the black Impala as his dad expertly weaved his way through the busy New York traffic. He seemed to be in a rush but Sam wasn't sure why. He tried to find out, though every time he asked he was quickly shushed by his older brother who whispered to him to 'shut up and let dad drive'.

Sam didn't mind, not really. His dad rarely told him where there where heading, nor did he ever let Sam partake in his hunts. Despite it being over two years since he found out, his dad was reluctant for Sam to help.

But it didn't matter. He was playing with his fighter pilot plane while Dean was playing on his new phone that he just received for his 14th birthday a couple of weeks ago.

The endless twists and turns that the car made seemed to go on forever, but finally when they stopped, the sun had already set. It wasn't unusual to be conducting a hunt during the night, but it was definitely strange for the trio to start a hunt on a main road. By Sam's understanding of his Dad's rules, that was a definite no no.

But that wasn't the weirdest part, surprisingly enough.

As both his Dad and brother got out of the car a large hand knocked on the window where Sam was sitting. He jolted up and looked towards where the hand was coming from, where he was surprised to see his Dad wearing a grim smile on his face.

"C'mon Sammy, I think we might need you for this one."

Sam, of course, didn't know how to feel, at first he was overjoyed. But as he got out of the car and his dad handed him a small dagger 'for protection' the joy within him dropped.

Yeah, he was about to go on his first hunting trip and he'd thought about going on one since he was 8, but this isn't what 10 yr olds should be doing. If he was being honest, a part of him wanted to hand the dagger back to his dad and get back into the car.

Never the less, he followed his brother into the block of apartments, confused as to what they were hunting.

He tapped Dean on the shoulder, "What is Dad looking for?", he asked.

Dean turned around, a .45 in his right hand. "No clue Sammy. Just follow him and shut your trap" he said trying to smile. Although he was failing miserably.

As the feeling of terror bubbled up inside him he stopped. Dean looked behind him, concern written all over his face, "You ok there Sammy?".

Sam shook his head slowly. Dean stopped, turned around and put his hand on Sam's shoulder. "Everything will be Ok, Dad wouldn't have brought you if it was anything too bad." Sam nodded, and took a deep breath.

"Hey, do you want to go in front of me and I'll take the back?" Dean smiled at him, a genuine smile, and all of a sudden Sam felt confident. Sam nodded towards his brother and as he walked in front of his brother he felt Dean clap his back reassuringly and Sam felt as though he could take on the world.

It was only a matter of minutes before they reached the apartment they were looking for. Sam watched as his dad placed his gun in the back of his jeans and just as he was about to knock, Sam heard an ear piercing scream.

Sam watched as he dad completely abandoned any form of manners and rammed his shoulder into the door. Managing to push the door right of its hinges on the third attempt.

Both his dad and Dean rushed inside already in action, unsure of what to do Sam followed. As he entered the room he could faintly smell something burning and he could see an intense orange light coming from the room to his left. But before he could investigate further Dean ran up to him and shoved a bundle of blue blankets into Sam's arms.

"Take him outside as fast as you can! Don't look back! Now Sam! GO!" Dean shouted at him. Without thinking Sam let his legs carry him straight out the door and back done the stairs they just come from.

It wasn't until Sam was back outside and next to the car did he look down and realize he was carrying a baby boy.

Sam looked down at the baby which was crying loudly, and as Sam tried to calm him, he got a closer look at the baby he was cradling in his arms. He had fairly tanned skin, black hair and green eyes. Really green eyes.

Sam smiled at the baby, and started to rock back and forth trying to calm the baby down. Eventually he sat down on the curb and started to stroke the boys hair. Sam hadn't realised at the time, but he had been sitting on the ground for nearly 20 minutes trying to make the boy stop crying.

The boy was nearly asleep when Dean finally came back outside.

Sam looked up at his brother, "What happened in there Dean?"

Dean struggled to form any words and sat down next to Sam heavily. He sighed and spoke quietly, "She's gone Sammy. She's gone and I couldn't save her."

Sam was confused, "Who couldn't you save Dean?"

Dean was facing forward, face solemn and eyes looking down, "His mother Sammy. This kid doesn't have... " Dean's voice cracked, "He doesn't have a mom anymore and there was nothing I could do about it"

Sam had no idea what to say, so he balanced the baby I'm one arm and put his other around his brother, and didn't say anything. After a while of nothing, Sam finally spoke, "I'm sure you did everything you could"

Dean didn't reply, Sam didn't expect him to. It was only a few minutes later when their Dad came down stairs, evidently angry.

"Boys, in the car" he snapped. Sam was brought out of his gaze and slowly started to stand up, trying to keep the baby asleep.

"Faster!" Their dad yelled, the two young boys quickly scrambled into the car, wanting to avoid any further yellings.

Once they were all in the car, the car jolted to a start before they even had close the doors properly. Sam had to hug the baby boy close to him to avoid dropping him.

As the group drove away, the only thing that could be heard were the sounds of sirens in the distance.

Nearly an hour later, Sam finally had the courage to speak.

"What are we going to do with the baby?" He spoke quietly, unsure if his dad was still mad.

"I don't know" John Winchester snapped, "We'll take him to an orphanage down town."

Dean sat up abruptly, "What?! No! We can't just leave him"

John hit his hand against the steering wheel and turned to face Dean, "There is nothing we can do for him now. It's because of us that he isn't dead!"

"We can't just leave him Dad! It's also because of us he doesn't have a mom!" Dean screamed back. Sam sat in the back of the car quietly rocking the baby as the pair in front continued to scream at each other until those fateful words were spoken;

"Fine then! If you won't take any responsibility, I will!" Dean turned his entire body to look at his dad, and his voice softened. "I'll look after him"

John looked at his son with a mixture of shock and disbelief, "and how do you think you'll do that exactly?"

Dean stumbled, unsure of what to say. Sam was nearly entirely sure it was because he didn't think he would get this far. Sam certainly didn't think he would.

"Oh, um. Sammy and I will look after him." Dean spoke, trying to force confidence into his words.

"Ok" their dad stated simply.

Dean turned around to face Sam, his face full of shock and happiness, "Well then Sammy, if he's ours we better figure out his name"

Sam looked down at the baby in his arms who, surprisingly was still fast asleep, bits of drool pooled in the corner of his mouth. Sam rested the boy on his lap and looked through the bundle of blue blankets hoping to find any indication of a name.

He flipped the corner part of the blanket, and there, written in a deep oceanic green, was the name 'Perseus' in a cursive font.

"Perseus. Perseus Winchester" Sam spoke quietly, looking at his new baby brother in awe.

"Ew" Dean exclaimed, "who would name their son Perseus?"

Sam looked at his brother in shook, and Dean looked back, a smirk evident on his face.

"You're impossible" Sammy said through a smile.

"Ok ok, how about we just call him Percy?" Dean replied turning to face the front of the car.

Sam looked back down at his brother again.

"Percy Winchester, welcome to the family"

AN:

There you have it, the first chapter of my crossover! Hope you all enjoyed it.

Please read my other two books. One is a Harry Potter and Percy Jackson crossover, and the other is an Avengers and Percy Jackson crossover.

*Gives you all virtual hugs*

Bye my little blue pancakes, xx