A/N: SO I really want to say thank you to my two reviewers and the slew of people that followed and favorited! This chapter is for your guys :D

"I don't know what it was," said Scott as he and his best friends waded through the creek. Percy, though, wasn't doing much wading seeing as she'd scrambled up onto Stiles' back the minute they caught sight of the creak. Stiles surprisingly hadn't said a word, just wrapped his clammy palms around her bare thighs nervously, trying to offer as much silent comfort as he could while trying not to look like he was feeling her up. Percy, though, was paying little attention and Stiles knew that if she had, she would have been teasing him to no end. She'd been in her own little world since they hurried out of the parking lot and he knew that she was thinking about her encounter with Jackson. He'd left a slight bruise on her upper arm that she kept rubbing absentmindedly. Stiles himself was seething, wondering how Jackson could be such a dick and why Percy had wasted her time on him in the first place. He found himself wanting to cause Jackson physical pain but he also knew he'd get his butt kicked if he tried. "It was like I had all the time in the world to catch the ball. And that's not the only weird thing. I hear stuff I shouldn't be able to hear. I smell things."

"Smell things," said Stiles as his brows rose and skepticism leaked into his tone. "Like what," he asked as he scoffed at Scott.

"Like the mint mojito gum in your pocket."

"I don't have and mint mojito—" started Stiles as he let go of one of Percy's legs and searching his pockets, but his words came to a halt when he found an old, partially unwrapped piece of green colored gum in his jacket pocket.

"And," continued Scott, "I can smell the strawberry flavored lip balm Percy is wearing even though I haven't seen her put any on all day." Percy froze from her spot on Stiles' back. Scott was right. Her lip balm was strawberry flavored. She wondered how he knew that when she'd forgotten the tube of chap stick at home that morning.

"So...all this started with the bite," asked Percy as Stiles shook his head in slight confusion. He slipped the gum back into his pocket and followed after Scott, his hand returning to its spot on Percy's leg. He wondered if Percy would be the next to claim to have superhuman hearing and a Doberman's sense of smell since she had a pair of claw marks to match his bite.

"Well what if it's like an infection, like my body's flooding with adrenaline before I go into shock or something?"

"You know what; I actually think I've heard of this. It's a specific kind of infection." Stiles paused to turn and look at Percy, sending her a wink to clue her in on the joke. She shook her head at him and his antics but a slight grin lifted her lips as she decided to join in.

"You're serious," asked Scott, worry forcing his brows to come together.

"Yeah I think it's called," Stiles through in a pause for dramatic effect, "lycanthropy."

"What's that? Is that bad?" Percy tried to hold back a snicker at the comic look of absolute horror on her best friend's face, but it came out as a somewhat strangled cough. Scott didn't seem to hear her though. He was too wrapped up in his visions of slow and painful death.

"Yeah it's the worst, but only once a month."

"Don't worry Scotty, I'll try to give you some pointers," chimed in Percy conspiratorially.

His expression seemed to morph into one that was equal parts of fear, horror and confusion. Percy laughed at him imagining himself dealing with his own set of monthlies. Confusion seemed to win out, though, as he asked, "Once a month?"

"On the night of the full moon," responded Stiles and he and Percy broke out into a howl. Understanding replaced confusion as Scott's two best friends broke out in laughter and he shoved Stiles. Stiles and Percy continued to though laugh as Percy slid down his back to stand on her own two feet.

"Hey, you're the one who heard howling."

"So did Percy," exclaimed Scott. "Besides, something could be seriously wrong with me!"

"Yeah Scotty, you're a werewolf," laughed Percy and Stiles threw in a growl for added affect.

"Hey, obviously we're kidding. But if you see me in shop class trying to melt all the silver I can find it's because Friday is a full moon."

"You don't even have shop class, Stiles. No one in their right mind would let you near a buzz saw."

Scott glared at Percy. "That's not the point. Besides, I'd do better with pointy objects than you would." Percy scoffed at his words as the came to a stop.

"I could have sworn this was it. We saw the body, the deer came running, and I dropped my inhaler." Scott bent down to search for it and Stiles turned to look at Percy for confirmation. She only shrugged her shoulders, having no clue if this was the spot or not. The woods all looked the same to her, especially when it was dark, and both boys knew she didn't have any sense of direction during daylight, so Stiles should have known that she sure as hell wouldn't have any in the middle of the night.

"Maybe the killer moved the body."

"I he did, I hope he left my inhaler. Those things are like eighty bucks." Neither Scott nor Stiles felt the eyes on their back but Percy did. She whirled around to find a guy staring right at her. He was tall, with dark hair and light eyes, and his broad shoulders were encased in leather while the rest of him was covered in all black. He was actually quite attractive, she noticed, but the permanent looking scowl etched into his face seemed to detract from it. Percy hit Stiles to get him to turn around, and when he saw the stranger, he did the same to Scott.

"What are you doing here," asked the stranger as he stalked towards them. He was sort of intimidating looking, but Percy realized that he wasn't that much older than they were. The boys seemed to freeze in fear but Percy's curious gaze raked over him, wondering what he was doing in the woods and how he had sneaked up on them so quietly. "This is private property."

"Uh, sorry man; we didn't know," replied Stiles as he shifted nervously.

"Yeah we were just looking for something, but," said Scott but his sentence trialed off. The stranger gave him a look as if to say continue and Scott did. "But, uh, forget it." He'd barely finished his sentence before the guy threw something white at him and turned to walk away. Scott caught it and Percy realized that it was his inhaler. Quickly, she called out to him.

"Wait!" The man stopped, acknowledging that he had heard her but he didn't turn around. "Did you find anything else? Like a silver moon shaped pendant?" Percy was hoping he had. The pendant had belonged to her mother and she had been out of her mind looking for it. It was one of those things that she never took off. She remembered it getting caught on a branch the night before, but she was fairly sure that it had remained around her neck after Scott had helped to untangle her. That could only mean that she had lost it during her romp down the hill or in the confusion during the deer panic. Rather than answer her though, the stranger continued walking as if she hadn't said a word. Percy crossed her arms angrily at his retreat. "You could have just said no, asshole." Her insult fell on deaf ears though and he didn't stop again.

Stiles tugged on her arm. "Dude, do you know who that is? That's Derek Hale!" Percy just looked at him, wondering why that was supposed to matter to her. "You remember, right? He's only like a few years older than us."

"Remember what," asked Scott when Percy didn't like Stiles wanted.

"His family. They all burned to death in a fire like ten years ago." Percy highly doubted it was that long. She faintly remembered the fire and she knew that ten years ago she and Emma hadn't moved to Beacon Hills yet. She remembered that one of the Hales had babysat her a time or two, though she was positive it wasn't Derek. She would have remembered if it was permanently scowling Derek; besides, she was almost positive the Hale that had watched her had been a young woman.

"Well I wonder why he's back," asked Scott, voicing the very question Percy had been wondering herself.

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"So I heard you went skinny dipping in the Rogers' pool this morning," laughed Percy as she joined Scott on the bleachers. When he didn't offer an explanation or even a glare like he normally did, she frowned. "What's wrong, Scotty?"

"I had a run in with Jackson." That news surprised Percy so much that she froze. She knew just what a run in with Jackson could be like and she had the yellowing bruise on her left arm to prove it. Before she could ask what had happened, Stiles ran up to them, his movements even more awkward and everywhere than usual.

"Scott, Scott, just wait up," he wheezed. Percy looked at him in concern, wondering what had him all riled up.

"Stiles, I'm playing the first elimination. Can it wait?" Scott's attention was already dwindling, far more focused on the match than what his friend was trying to say

"Just hold on, okay. I heard my dad on the phone," he reached out and grabbed Scott's arms, bringing his attention back to what he was saying. "The fiber analysis came back from the lab in L.A. They found animal hairs on the body from the woods!"

"Stiles I gotta go." Scott grabbed his lacrosse stick and hurried to the field before Stiles could protest.

"No! Wait! Scott," he nearly tripped over himself to grab Scott but his best friend continued towards the field. "You're not gonna believe what the animal was." Percy had a feeling she knew what the answer was already but she asked anyway. Stiles turned to her, his expression showing worry. "It was a wolf."

"Shit," cursed Percy. "Are you saying what I think you're saying?"

"I don't know Percy. What we said in the woods, those things don't exist. I'm probably overreacting. You know how my imagination gets." It was something she'd always told him, that his imagination was way past the point of overactive; but she found herself not believing his words, and she know he didn't either.

She and Stiles both sat on the bench to watch the match. She watched as Scott caught the ball and winced when Jackson shouldered him to the ground. She was surprised to see Scott take the ball from Jackson, race down the field, and flip over his team mates to make the shot. She was proud of Scott, she really was, but she was afraid to find out where all his sudden athleticism was coming from. She was happy for him though when she heard Coach tell him that he'd made first line. Stiles, on the other hand, seemed to worry that much more.

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"Did you get them?"

"What do you think I'm carrying you dumbass," grunted Percy in annoyance and she glared at Stiles, although the effort was wasted. He was too busy focusing on his computer screen and everything she was carrying blocked her face from view. Percy sighed in relief as she threw the mountainous pile of books onto the edge Stiles' bed. They bounced once before many of them clattered to the floor, clearing a space for Percy to flop onto. "I hope you know that you owe me, Stilinski. That old bat at the checkout counter probably thinks I have some type of weird fetish now because of you," she mumbled as she looked at one of the books entitled Supernatural Mating Habits: The Lowdown on How Monsters Get Down, wondering why the town library had such a book in stock in the first place.

"Just start reading, okay," responded Stiles as he printed something out. Percy sighed, but picked up a book about the full moon and opened to the first page. The two sat in relative silence as the went about looking for information, the flipping of pages and the clicking of keys filling the room. Hours later, Percy sat cross legged in the center of a circle of discarded books and pages of paper were strewn across the floor when a knock sounded at the door. The sharp raps shook her out of her stupor and she rubbed her tired eyes as Stiles opened it and quickly ushered in a smiling Scott.

"Did you bring it," asked Percy from her spot on the floor as she eyed the the bag Scott was carrying. He rolled his eyes at her but nodded as he pulled out a package and tossed it towards her. Percy beamed at him and tucked into the pint of ice cream inside. Sweets were her kryptonite and she knew sugar was the only way she'd be able to get through Stiles' Adderall induced bout of insomnia.

"You gotta see this dude. I've been up all night," Percy protested around a mouth full of ice cream and Stiles amended his sentence. "We've been up all night reading websites, books, all this stuff."

"How much Adderall have you had today?"

"Too much," responded Percy. Her words were garbled and slurred, and the boys had a hard time understanding her because her mouth was full.

"Doesn't matter. Listen."

"Is this about the body," asked Scott as he joined Percy on the bed. "They found out who did it?"

"No they're still questioning people, even Derek Hale."

"You mean Mr. Stick Up His Ass from the woods," grumbled Percy as she scraped the last bits of creamy goodness from the bottom of the carton.

"But that's not it okay. Remember the joke from the other day?" Stiles tried to laugh but it came out as a pitiful wheezing noise instead. He no longer found it funny. "Not a joke anymore." Scott looked at him in confusion. "The bite in the woods, the wolf? We started doing all this reading. Do you even know why a wolf howls?!" Scott turned to Percy, wondering what she thought about all of this, but she just shrugged, finding werewolves kind of hard to believe herself. But despite that, it was all making sense to her and she found herself going along with Stiles and his crazy theory.

"Should I," wondered Scott. None of this was making sense to him, and with his date soon, he didn't have room to worry about Stiles or his stupid questions.

"It's a signal," supplied Percy. She knew Stiles was all riled up, and with all the Adderall he'd taken, his usual hyperactive speech was inching towards hysterical. "When a wolf's alone, it howls to signal its location to the rest of the pack. So if we heard a wolf howling that means others could have been nearby, maybe even a whole pack of them."

"A whole pack of them?" Scott looked completely confused. He couldn't figure out why this was so important to them; why it even mattered.

"No werewolves," Stiles replied, his face completely serious.

Time seemed to stop for second before Scott abruptly stood angrily. "Are you seriously wasting my time with this? You know I'm picking up Allison in an hour." He slung his pack over his shoulders and turned to leave, but Stiles put a hand on his chest to stop him.

"I saw you on the field today Scott. Okay? What you did wasn't just amazing, it was impossible."

"So I made a good shot."

"No you made an incredible shot," exclaimed Stiles as he grabbed his friend's bag on threw it back on the bed. "The way you moved – your speed, your reflexes. Y'know people can't just suddenly do that stuff overnight. A-and there's the vision and the senses… Oh, don't even think I don't notice that you don't need your inhaler anymore."

"Okay," Scott shouted and his best friends were taken aback. Scott didn't often snap at them, he barely ever even raised his voice. "Guys I can't even think about this right now! We can talk to tomorrow."

"Tomorrow," questioned Stiles. "What? NO! The full moon is tonight. Don't you get it?"

"What are you trying to do," yelled Scott and Percy unconsciously flinched. "I-I just made first line. I-I got a date with a girl wh-who I can't believe wants to go out with me. Everything in my life is somehow perfect, why are you trying to ruin it?"

"Hey," Percy snapped as her temper spiked. "Don't start yelling at us. We're your friends for Pete's sake, we're trying to help your werewolf ass!"

"Stop saying that word!"

Stiles pulled Percy down onto the arm of his chair before he temper could get the best of her. Scott could already be feeling the need to change and he didn't want a confrontation with Percy setting him off. "We're just trying to help. You're cursed, man. Y'know a-and it's not just the moon who calls you to physically change; it just so happens to be when your bloodlust will be at its peak."

"Bloodlust?"

"Yeah," nodded Percy and Stiles finished the sentence for her. "Your urge to kill."

"I'm already starting to feel an urge to kill Stiles," responded Scott with a pointed glare aimed at Stiles

"Funny," growled Percy. "Your sudden attitude has me feeling the same way." Stiles sent her a warning look before he turned around in his chair to look for something. When he found the old, worn book he began to read aloud.

"The change can be caused by anger or anything that raises your pulse. Alright; I haven't seen anyone raise your pulse like Allison does." Stiles lunged for his bag. "You gotta cancel this date. I'm gonna call her right now."

"What are you doing," Scott asked, his eyes following Stiles' movements with a predatory gaze.

"I'm cancelling the date."

"No," Scott cried and shoved Stiles into a wall. "Give it to me!" His fist shot back, aimed at his best friends face. Percy darted forward and caught it before Scott could do anything to hurt Stiles or anything else he might regreat. She looked very pissed off as she glared at Scott. Her hard gaze seemed to shake him out of it and he yanked back his arm before he turned and struck the chair instead.

"Get out," bit out Percy as she looked between the two. She had a hard time believing what had just happened. Scott had never lashed out at them before and Percy didn't know what to do. She could see by the regretful expression on his face that he hadn't meant to but that didn't change that he had. Stiles eyes finally opened and he stared at her in fear. That fear strengthened Percy's voice as she repeated her words. "Get out Scott. Please." She didn't want him to think that they hated him, but with tension running high, it was probably best for him to leave.

"I-I'm sorry," he stuttered and took a step back. "I gotta go get ready f-for that party." He grabbed his bag and apologized again before leaving the room.

Stiles banged his head against the wall after he had left and Percy bent over to pick up the fallen chair. "Shit," she mumbled as she stared at the jagged slashes on the back of the chair, ones so similar to the ones marking her hip. Stiles caught sight of them too and the duo shared a worried look. Stiles was right. Their best friend really was a werewolf.

"I'm taking you home," called out Stiles as he searched for his keys.

"The hell you are," replied Percy. When she saw Stiles' keys laying on the night stand, she grabbed them and slipped them into her back pocket before he could turn around. "Not if you actually want to get to that party."

"Give me back my keys."

"Not until you tell me that I'm coming with you."

Stiles sighed in exasperation but shook his head. "No. I'm gonna drop you off at home and you're gonna stay there. It's too dangerous.

"That's not what you said the other night when we went looking for an axe-wielding murderer in the woods. That wasn't any less dangerous," she argued. "Besides, we both know I'll end up at that party one way or another. Either I hitch a ride with you and you can make sure I stay out of trouble or I can get there on my own."

"Fine," Stiles conceded and Percy happily handed over his keys. "But you have to promise me that you'll get out of there if he starts to change." Percy opened her mouth in protest but Stiles cut her off. "I know you can take care of yourself, but if anything happens Scott won't forgive himself." Percy's mouth snapped shot and she nodded. "Good. Now c'mon, we have a party to crash."

The party was in full swing by the time Percy and Stiles showed up. Scantily clad bodies ground against one another and Percy found herself feeling out of place in her ripped jeans and lace tank. She looked around for any sign of Scott or Allison but she was much too short to see past the sea of bodies, even with heels on, and Stiles was fairing no better. They shoved their way between dancing couples, and while Stiles made his way out to the pool, Percy found herself groped and pushed toward the house instead. She was happy to be free of the sweaty bodies and the wayward hands, but after a quick search of the house she was no closer to finding Scott. Closer to being permanently scarred, yes, after walking in on one too many teens on their quest for home plate, but she was no closer to locating either of her best friends.

"I'm too sober for this," she groaned in annoyance as she stumbled down the last step. She perked up though when she caught sight of the drink table and she quickly snatched up one of the red cups. Before she could take a sip, Scott crashed into her and the warm beer spilled all over her. "What the hell," she muttered but Scott was already down the hall. She chased after him, calling his name as she did, but he never stopped. By the time she made it outside, he'd already sped off. Allison showed up a few second later and she watched as her date disappeared.

"Do you know where he's going," asked Allison, trying to keep the anger and shock from her voice. Percy tensed. She didn't have any female friends so she didn't know what to say. She knew she couldn't tell the truth, that the moonlight was causing her best friend to grow fur and a tail, but she also knew that she wasn't like Stiles who could lie convincingly on the spot. So she went with the truth, at least partially.

"He wasn't, uh, feeling well. He said he was sorry though," she managed to say. She didn't sound very convincing at all but Allison nodded in understanding so it seemed to work.

"Do you think maybe you could give me a ride home then?"

Percy nodded. "I'm sure Stiles wouldn't mine," the rest of her sentence cut off though when a familiar beat up blue jeep sped past them. Her phone buzzed in her pocket and she sighed when she checked her messages. She had new text from Stiles: Gonna check on Scott. Be back later. "Looks like I got nothing. Stiles left to go check on Scott so I'm stuck here too."

"Allison," called a voice, and both girls turned to see Derek Hale. He was dressed in his leather jacket again but, instead of wearing all black, his shirt was white this time. "I'm a friend of Scott's." Percy opened her mouth to say otherwise but the dark look he sent her in warning told her to bite her tongue. When Allison looked at her in question, she shrugged, neither confirming nor denying what he said. "My name's Derek. Scott asked me to take you home." Without waiting to see if they would follow, he made his way towards a black Camaro. Allison was only steps behind him, but she stopped when she realized Percy was still rooted in her same spot.

"Aren't you coming," she asked. The glare Derek was sending her from near the open door of his car told her to play along and she nodded and made her way over. Allison took a seat in the back while Percy found herself riding shotgun. She wanted to say something to Allison, something to make up for her best friend's stupidity, but she didn't know what to say in these kinds of situations so she kept quiet instead. She settled for texting Stiles to let him know that she'd gotten a ride and enduring the awkward silence filling the car. It wasn't long before Allison was dropped off and it was just her and Derek. Percy gave a sigh of relief as the sense of awkwardness seemed to end with Allison's leave.

"Why were you at the party," Percy asked after a few minutes. "I don't know about you, but I think it seems very pedo-ish to be twenty-something and at a high school party."

Percy could hear the audible click as Derek clenched his teeth together in anger. "I was keeping an eye on Scott."

Percy turned to face him in surprise. "It speaks." She hadn't expected him to respond to her since he hadn't said a word to her in the woods nor did he acknowledge her at the part. Her comment was met with a growl but no other sign that he'd heard heard her. Instead, he reached into his jacket pocket to retrieve something and a flash of silver caught Percy's eye. "So you did find my necklace, you asshole." As she lunged for the pendant, she realized that insulting him probably wasn't her brightest idea, but she was too annoyed to play nice. At the last second, Derek snatched his hand back and Percy had to catch herself on the armrest to avoid falling onto his lap.

"Where did you get this," Derek asked. When he'd found the antique pendant with swirl like etching he had been compelled to keep it when it struck a chord of familiarity in him. He couldn't place it, but he knew that he'd seen the same necklace before.

"It used to belong to my mother. My aunt gave it to me after she died," Percy managed to bite out with a scathing glare. It had enough anger behind it to rival one of his own. Derek wondered what had happened to her in her short lifetime for such angry to reside in her. Without another word, he offered her the pendant and she snatched it from his grasp. When he came to a stop in her driveway a few minutes later, she hopped out of his Camaro without a backwards glance, slamming the door with such force that the entire car shook.

Percy had barely shut the front door behind her when her phone started ringing. "Hello," she growled as she kicked off her shoes in the foyer. She needed something sweet to calm her nerves and there was a frozen tub of cookie dough waiting in the kitchen with her name on it.

"Percy? Where the hell are you," asked Stiles, his voice frantic and shrill with worry.

"I'm at home Stiles. Didn't you get my text? I told you Derek gave Allison and I a ride home."

"Derek," asked Stiles, his voice cracking on the last syllable. "Oh, God Percy I shouldn't have left you at the party. Are you okay? Please tell me that you're okay." On the other end of the phone, Stiles was tripping over himself as he raced towards his Jeep. God he hoped Percy was okay. Stiles didn't know what he'd do with himself if something had happened to her because he'd stupidly left her behind.

"Stiles? Calm down," she cajoled. She was starting to worry now. He'd never sounded so worried before. "I'm fine Stiles. Just tell me what's wrong. Is Scott okay?"

"He locked me out of his room. I think he went after Derek."

Percy was really confused now. "What? Why," she asked.

"Because Derek's the werewolf. He's the one who killed that girl and he's the one that bit Scott." If Stiles said anything else, Percy didn't hear it. Her phone slipped from her grasp, bouncing off the counter top before clattering to the floor.

"Well shit."

A/N: Thanks for reading guys! If you want to see what Percy's outfit looks like just check out my Polyvore. My username is aduniquleyme and all the outfits will be labelled teen wolf and their set number will correspond with the chapter. On another note, you guys got to find out a little bit more about Percy's past and how Derek and his family fits into it. Don't forget to review! Muah xoxo