Author's Note: Hey, thanks for reading! This is the first multi-chapter fic I've planned on writing with a consistent storyline. I apologize for any errors in advance.

This takes place shortly after Nico talks to Percy in the beginning of Son of Neptune and starts in early season one of Supernatural. Yes, the only pairing I've decided on so far has been Percico. However, (to those of you that dislike this pairing), it doesn't show up very much.

Another small note, I'm still reading Mark of Athena and have only watched the first three seasons of Supernatural, so I apologize if anything is inaccurate.

None of the characters or places in this fic belong to me, unless otherwise stated in the beginning.

Chapter 1: Nico Has Lunch with Captain Hook

Honestly, Nico didn't know how he ended up in Ankeny, Iowa, he just did. He guessed it was just a sense he had- being the Ghost King and all, a sixth sense for the supernatural had to come naturally to him… right? Of course, I think some background information is needed here.

Nico had just left Camp Jupiter after a run in with Percy. While I'd like to tell you that their reunion was happy and full of sunshine and rainbows and pretty sparkly oceans, it was actually terribly depressing. Percy didn't remember a thing about Nico- or anything, for that matter. All he remembered was his best friend Grover and his… girlfriend Annabeth. Granted, not that Nico thought he meant too terribly much to Percy, but Percy meant quite a bit to him. He shook his head- he had to get his mind of his stupid little crush on a straight guy with a girlfriend. Anyway, back to the explanation- Nico needed to get away from half-blood drama, so he took a road trip, and this shit hole was where it had taken him.

He flopped back on the motel bed and (somehow) read the newspaper clutched in his hands again. Apparently, someone had been murdered here, and the attacker had been "invisible". This had prompted Nico to raise an eyebrow.

'A ghost,' he thought. 'But what kind of ghost kills people? Or maybe it isn't a ghost, but a monster? But what kind of monster is invisible?' Nico knew what had to come next- a McDonalds run and a trip to the graveyard.

About 15 minutes later, Nico had completed item one on his checklist, with the added bonus of feeding himself along the way. Finishing off his Big Mac, Nico made a run for the graveyard. Now, when Nico got there, he expected it to be fairly empty. What Nico did not expect was for two grown men to be discussing something next to the grave he had made a beeline for.

'Well,' Nico thought, 'this complicates things.' Things got especially complicated when one of the two turned around, noticed him, and pointed a gun at him.

"Who are you?" The taller of the two asked with suspicion. The other had a gun pointed at his head, though he looked wearily towards the sword strapped to his side.

Nico did suppose that he looked a little odd, running up to a graveyard with a bag of McDonalds and a sword that, apparently, these two could see. He dropped the McDonalds bag and put his hands up.

"Just your typical high school troublemaker," Nico replied smoothly, no hint of fear in his voice. He was in a graveyard- if he even tried to shoot, he had an army of bone shields- like meat shields, but less effective. The one holding the gun narrowed his eyes.

"I find that hard to believe, showing up here with a sword and…" he glanced at the bag on the ground for a moment, "a bag of McDonalds." Nico tilted his head.

"True, true. I see your point." He sighed. "Well, since you can see through the mist, I suppose there's no point in hiding this from you. So then, first things first… you guys know about the Greek gods?" Nico asked. The two nodded, and Nico continued. "Lovely. Well, they're real, I'm a demigod son of Hades, and I came to temporarily resurrect the murder victim." They both blinked several times and looked at each other.

"Well, Dean… we've run into weirder," the taller one pointed out, and the one with the gun (who Nico now knew was Dean), glared back.

"Yeah, well not everything in mythology is real, now is it?" Dean asked. Nico contemplated for a moment.

"Would this help?" He asked, and he summoned a few skeletons from the ground. The two went wide eyed.

"Well, I guess you're right, Sam." Dean stated, lowering the gun.

"Dean Winchester. Dork over here is my little brother, Sam." Sam glared at Dean. "Jerk." Dean grinned back.

"Bitch." Nico rolled his eyes.

"Nico di Angelo. Now, can I take my McDonalds and resurrect this guy, or am I going to have to pay a fee?"

Sam and Dean moved out of the way to watch as Nico took his McDonalds hamburger and chocolate milk and dumped them on the ground. Dean raised an eyebrow.

"Is this some sort of voodoo, black magic ritual?" he asked, as Nico prepared to speak. Sam looked over, also curious. Nico shook his head.

"Nah, no magic involved here. Ghosts just really, really like food," he replied.

After a short talk with a dead guy in which he learned nothing, Sam and Dean invited Nico back to their motel room.

"Might as well," Dean explained, "since we're working together here."

(It was only a complete and utter coincidence that their rooms were right next to each other and totally not something I put in place for convenience. Not at all!)

After a bit of pizza and a short night's sleep, the three ended up at another crime scene, with another dead at the hand of one really vengeful spirit. Sam glanced over at the first victim's girlfriend and second victim's friend, Lori.

"She seems to be around all of the victims, doesn't she?" Noted Sam. Dean nodded, but Nico looked at the girl, eyes narrowed.

"I see…" He mumbled.

After a few minutes and some talking to Lori, the trio decided it was time they hit up the library. With Sam's computer magic and a bit of searching, they found their guy.

"Jacob Karns… anyone know where he was buried?" Nico asked. Dean glanced over the paper one more time.

"Apparently in an unmarked grave, which means we'll have to go searching." Sam took a quick glance at the paper.

"Interesting hook he has there," he commented (Woo! Obvious foreshadowing!).

And now, to the next place our story skips around to (it does that a lot, doesn't it?), the graveyard… again. Nico was once again alone with a bag of McDonalds and a Big Mac in his mouth. He was to salt and burn the corpse, and then talk to the spirit, apparently. He looked at the shovel next to the grave with distaste, but got to work.

It had taken about half an hour, but Nico was now waving his hand in front of his face to ward off the smoke as the corpse burned into the night. Since Nico didn't have a phone, he'd temporarily been given Dean's, and he knew something was up when it rang.

"Hello?" Nico greeted with a question, one with a meaning Sam could easily interpret- What went wrong? Sam sighed.

"Jacob Karns is still here, and still attacking people. Did you burn him?" At Nico's affirmative answer, Sam cursed. "The hook… of course. See if you can summon him and ask him about the hook. Dean and I'll go looking through the Library again."

After Nico hung up, he dumped his McDonalds bag onto the ground and finished the ritual. Now, nobody seemed to have thought of this, but Nico found out pretty quickly that, apparently, summoning vengeful spirits brings them to you. Wonderful. The spirit eyed the quarter pounder with distaste and lunged after Nico.

In response, Nico bolted.

Nico had talked to the dead, yes, and he had moved them around, but he's never had to fight one of them. Running for his life, Nico made a mad dash for the church and quickly located Sam and Dean, who were looking at him slightly funny.

"Yeah… so… apparently, summoning his spirit… brings the vengeful spirit to you… and I probably should have thought of that before," Nico explained between pants. Sam and Dean paled.

"You mean he was after you?" Sam asked. Nico nodded.

"But only for a short time. One of the dead would never kill me, if only for my title and their fear of my father's wrath."

"Well, shit," Dean mumbled, staring back at the papers.

"What about the hook?" Nico asked. Sam sighed.

"Re-forged into an unknown silver object in the church." Dean looked out the window at the sky, which was starting to lighten up slightly.

"Well, looks like we better get to work." Nico groaned.

"We have to burn anything even remotely silver, don't we?" Sam and Dean nodded.

An hour later, the trio had come up with nothing whatsoever. Everything that even looked silver was burned, and the "evil son of a bitch" (as Dean phrased it) was still creeping around town. Lori had shown up, distressed, and Sam had gone to talk to her. Dean was about to check up on the two of them when Sam came crashing into the room, Lori right behind him.

"Run!" He shouted, quickly maneuvering Lori in front of him. Dean and Nico scrambled around the room in an attempt to get away. Turning around to see the spirit gaining on him and Dean, he grabbed Dean's arm and pulled him into the shadows without warning. As the spirit sat look around in confusion, Nico appeared back next to Sam and Lori, who had escaped back to the main area of the church. Dean stumbled next to Nico.

"That was weird… helpful, but weird," he stated, regaining his footing. Sam grimaced.

"Apparently Lori has been subconsciously controlling the ghost, which is why it's attacking people Lori feels have done something wrong. Now that she feels as if she's done something wrong, the thing is after her," he explained, looking back to Lori. His eyes widened.

"Lori… where did you get that necklace?" he asked. Lori picked up the silver chain.

"This? It's a church heirloom; my father gave it to me… why?" Sam looked panicked as he heard banging on the doors.

"Look, we don't have much ti-" he was cut off by the door busting open. Nico grabbed Lori's arm.

"Hold it off!" he shouted. "I'll take her with me!" Nico shadow travelled down to the boiler room.

"Look," Nico started, "the only way to kill this thing is to burn that necklace, which was made with his hook." Suddenly understanding, Lori quickly took off the necklace, but jumped as she heard a gunshot upstairs. "That must have been Dean…" Nico mumbled. He glared at Lori. "Hurry!" She yelped at his terrifying gaze and tossed the necklace to Nico, who tossed it into the fire.

Walking back out and up to Sam and Dean, Nico noticed the absence of the hook man. "Did we get him?" he asked. Sam nodded.

"Yeah. He's gone." The sun was starting to rise, and sirens were heard in the distance as police showed up onto the scene.

A few hours later, Sam glanced over at Lori, who was sitting on the back of an ambulance. Sam had just rejoined Dean after having his arm patched up when Nico walked over. Dean raised an eyebrow.

"Aren't you gonna go home, kid?" he asked. Nico was about to answer, then hesitated.

"I… don't have much of a home. I'm kinda just wandering. And about that…" Nico trailed off. "I was wondering if I could head off with you two?"

Sam and Dean looked at each other, before Dean shrugged.

"Ah, what the hell, sure." He grinned at Nico. "Welcome to the group, midget." Nico shot him a glare and cursed at him in Greek. Dean blinked.

"Do I even want to know what you said?"

Nico shook his head. "Probably not."

After gathering their belongings from their motel rooms and shoving everything into the Impala, the three climbed into the car. As the vehicle moved across the road, Nico yawned and curled up on the back seat. Sam looked back at him questioningly.

"What?" Nico asked. "Shadow travelling and resurrecting the dead is a lot of work," he paused to yawn again, "and as they say,' with great power, comes the great need to take a nap'."

Omake:

Nico dropped his bag of McDonalds on the ground and summoned the spirit. What he did not expect was for the hook man to show up, eye the quarter pounder hungrily, and devour it quickly.

"Thank… you…" he spoke in a raspy, broken voice. "I… can… rest… peacefully… now…"

And with that, his spirit vanished to the Underworld. Nico blinked several times, then backed up veeeerry slowly… and ran.