A/N: Hola peoples of Earth, Gallifrey, Raxicoricofallapotorius, Klom, and other planets. Here's my new story, an idea that came to me when I was dreaming about Nico shadow-traveling into my house, and then randomly adding DW to it cause I'm obsessed. Anyway, this story (or at least this chapter) is dedicated to Wingz-and-a-Fez because she is the only reason I actually made this a full story. Anyway, hope you like it and review!

Disclaimer: I don't own PJO, DW, or anything really.

Copyright: I own the plot, Dani, and Jeff. That's pretty much it. Enjoy!

Chapter One

The end of the world began when Nico di Angelo appeared in my bedroom.

Yes, yes, I realize how wrong that sounds, but he didn't do anything. He literally just appeared. As in, one second he wasn't there, and the next second, he was. Poof. Just like that.

I was alone at my computer, eternally bored because my parents (well, mom and step-dad, but same difference) were at some lame party that literally no one cared about- even them.

So I sat in my room, being bored, googling random words, just to see what came up (if you google the word, 'you' there's actually a Wikipedia page on it) when an unnaturally dark shadow appeared in the sky and a boy fell out.

He landed neatly enough, but then fell to his knees and started grumbling and cursing in three different languages.

"Who are you?" I asked.

He looked up in surprise; then frowned at me, obviously confused. He blinked a couple times; then rubbed his eyes. Finally, when he probably realized he had no idea where he was, he asked in return,

"Where am I?"

I sighed. "You're in my bedroom. Who are you?"

He shook his head. "No, what country?"

"America?" How could he not know what country he was in? "Who are you?"

"State?" he continued. I sighed again, now exasperated.

"Maryland. Who are you and what are you doing in my bedroom?"

"Maryland. That's not too far from New York," the boy muttered.

I cleared my throat, angry now, and he looked up. "Hmm? What?" he asked. I glared at him. "Oh, right. Nico."

I rolled my eyes, and continued to glare. He looked up again. "Nico di Angelo," he rephrased.

I made a motion with my hand that obviously said, "Keep going."

Nico sighed. "I don't know what I'm doing here," he admitted. "I screwed up. I was trying to shadow travel all the way to camp, but it's a long way to New York from Australia. Took a lot out of me. Couldn't make it all the way."

The first thing I wondered was what the Hades he'd been doing in Australia, but before I could ask, my cell phone rang.

I checked the Caller ID; then said to Nico, "If you're so tired, take a nap. I gotta take this."

He looked kinda surprised at the offer, but eventually curled up on my bed and fell asleep.

I rolled my eyes and answered the phone. "Hey, Perce. What's up?"

Behind me, Nico sprang up from the bed, but I ignored him.

"Just waiting for a friend of mine," Percy replied. "Got bored, decided to give you a call."

I rolled my eyes. "Oh, so I'm who you call when you've got nothing better to do?" I asked sarcastically.

"Pretty much," Percy answered. I laughed and rolled my eyes again.

"Who are you waiting for?" I asked him. I could practically hear him shrug from the other end.

"Oh, just a camp friend. You'll probably meet him tomorrow. He doesn't come to camp very often, but I convinced him to hang out for the summer. You'll probably like him. He's the only person in existence who's more anti-social than you are."

If I'd been with him in person, I'd have hit him at that comment.

"What's his name?" I asked, just because I couldn't think of anything else to say. Nico was sitting on the edge of my bed now, staring at my phone like it was a bomb. I turned away so I wouldn't have to look at his corpse-like face.

"Nico." I froze and slowly turned to face the boy still standing there.

"Hey, Perce, I gotta go. I'll see you tomorrow," I spoke into the phone. I hung up before Percy could say anything else.

"How do you know Percy?" we both asked at the same time.

"He's my cousin," Nico replied.

"He's my brother," I answered. "Well, half-brother. Well, technically not brother at all, but still, I think of him as my brother…it's confusing."

"Yeah," Nico agreed. "Technically, we're not cousins either. Parallel cousins, really. His dad's Poseidon; mine is Hades. Technically, we're not related in any way, shape, or form, though. Why do you think of him as your brother?"

I began to answer, but froze when I heard the kitchen door open downstairs.

"Dani? Where are you?" my mom called.

My eyes widened and before Nico could ask questions, I grabbed him and shoved him in the closet.

"Dani?" my mom yelled again, coming upstairs.

Nico began to protest, but I slapped a piece of duct tape over his mouth and shut the door.

"Daniella Amelia Song! Get down here!"

I sighed. "Coming, sorry!"

I rushed down the stairs to meet my mother. Her curly blondish hair framed her flawless face as she looked down sternly at me.

"What took you so long?" she demanded. I looked down in shame, occasionally glancing at the pocket where I knew my mother kept her laser gun as I thought of how I should answer.

"Sorry, I…fell asleep. I didn't hear you until now."

My mother smiled at me and ruffled my hair. I always wondered why I looked absolutely nothing like her or my grandparents.

My long hair was darker and much straighter than Mom's. It always flops over my eyes in the front, the way she claims my dad's does, but I wouldn't know. I've never met my dad.

Mom says our eyes were similar too, mine and my dad's. She says his brown eyes match mine completely, even in the way they seem to hold nine hundred years of knowledge, while her own eyes are bright blue and of their own time.

"Melody? Are you upstairs?" Jeff, my stepfather called.

Mom sighed and closed her eyes before answering, "In a minute!"

I knew Mom hated what her husband called her. Technically, she had been born Melody Pond (and that's what Jeff referred to her as), but ever since she first met my dad, she'd been River Song. She always told me that she was so lucky that Jeff at least let her keep her "fake" last name for me.

"So, I thought you guys would be at that party thing for at least another two hours," I said, trying to fill the awkward silence.

My mom shrugged. "It was so dull, Dani. Your father would've hated it."

I nodded knowingly. My mother had told me millions of stories about how many times she had almost gotten arrested because my father had gotten bored.

"Melody!" Jeff called again. Mom sighed and glanced at me apologetically before retreating down the stairs.

The second Mom was out of sight, I rushed back upstairs and yanked Nico out of the closet.

"So….Daniella Amelia Song, huh?" he asked once I'd ripped the tape off his mouth.

I nodded.

"Interesting last name," he commented.

I shrugged. Nico rolled his eyes.

"So, you were telling me why you thought of Percy as a brother before we were rudely interrupted?" Nico prompted.

I shrugged again. "It's a long story," I answered simply. "That I'd really rather not go into at the moment. Now, you better get off to camp. Percy's waiting for you."

Nico nodded, but stalled as long as he could, probably hoping that I would get annoyed of him and tell him the story to make him leave.

I didn't tell him the story, of course. It was too long and complicated, and I didn't even understand half of it. But before I could literally push Nico out the window, a light flashed on and off in front of me, making me freeze. I'd seen that light before. Somewhere. And the noise. I knew that noise. That noise was like my version of a lullaby.

I cautiously stepped forward and stroked the blue wood.

"What the Hades is going on?" Nico demanded. I didn't answer.

Suddenly, the doors burst open and an overly happy, extremely familiar man jumped out.

"Dani!"

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