A/N: This Chapter has Two POV's: Skye and Derek's

Skye's POV

Derek had taken Erica's body to a place where he knew she'd be found and they'd assume she was there all along, her injuries would speculate that after running away from home she slipped and broke her spine. Boyd and Cora we're our main priory right now which is why we were all out in the woods trying our best to track Boyd and Cora while Scott was in another part of the preserve trying his best to find them as well.

I sighed and closed my eyes trying my best at tracking Boyd and Cora by scent but I still wasn't very good at tracking since I'd only ever had use of it on one other occasion and didn't exactly have much of their scents to go on.

I opened my eyes and turned to Derek when I heard his phone buzz in his pocket and he picked it up straight away putting it on loud speaker even though I would have been able to hear but I stepped closer towards him anyway.

"I lost Boyd" I heard Scott say making me growl.

"You lost him" Derek snapped at him.

"Yeah I kind of had to" Scott responded slightly out of breath.

"Wasn't exactly the plan" Derek replied sighing.

"I know, which is why I think we should stick together, trust me he's too strong, too fast and way too angry for one person to handle, we gotta do this together"

"Look Skye and I are at the trails by the entrance to the preserve, can you meet us here?" Derek asked him while I stepped away and sighed because even though we needed to find Boyd and Cora this is the last place I want to be right now, Erica was dead and I couldn't help think it was my fault because if I had tried to make her and Boyd stay then this could have all been avoided.

"Yeah, just gotta drop something off first" Scott replied, Derek hung up the phone and looked over me but I tried to avoid his gaze so he didn't see my guilt but of course he knew, we know each other better than anyone else ever could.

"You don't have to be here" I heard him say. "If it's too much for you tonight…"

"No it's okay" I looked up. "We need to find them, I can mourn later" I added before walking away from him, I didn't want to but right now Derek's sympathy was not what I needed.

"Skye what happened wasn't your fault" Derek continued clearly not seeing that I didn't want to talk but I knew he was only trying to help so I turned back. "You know that right?" I sighed before sitting down on a fallen tree.

"I should have tried harder to make them stay…I should have done something…" I replied as I hung my head.

"Look at me" Derek said softly, I slowly lifted my eyes to meet his forest green ones. "What happened to them was not your fault, nothing you could have said or done would have changed their minds, I know you know this"

"I just…I don't understand this…why would they do any of this, why make Cora and Boyd go crazy, why kill Erica?" I asked but was more asking myself then him.

"I don't know…but what Scott said tonight also has me questioning their moves?" I looked up at him questionably "Why wait until now?" he added, I shrugged then looked down.

"They're obviously planning something and it scares me that we have no clue what that is"

"Hey" he sat down next to me then pulled me to his side. "Don't get worked up over this…let's just focus on finding Boyd and Cora for now okay" I nodded in agreement then heard leaves crunching under someone's feet as they approached, Scott came into our view and nodded at us.

"Ready?" we both nodded and took off running working together.

We kept our eyes, ears and noses out but we still weren't having any luck, I through a gap between tree branches behind Derek and landed on my feet watching Scott jump over behind us then roll into a crouch as we looked around for signs of the blood thirsty Betas and I saw Derek looking at two sets of footprints.

"Is it them?" Scott asked looking at the footprints to.

"We're not the only ones that decided to stick together" Derek answered.

"Is that a good thing or a bad thing?" I asked.

"I don't know"

"Derek" Scott said standing up from his crouch. "I saw Boyd try to rip two little kids apart, are they going to do that to everyone they find?"

"Everyone and anyone" Derek replied walking past us, I sighed and quickly caught up with him.

"We should get Isaac out here to help us, the more we have out here the better chance we have of finding them" he nodded so I pulled out my phone and texted Isaac to meet up with us then we continued our search for another twenty minutes before I finally heard something. "Wait!" I whispered quietly and stopped holding my hand out to the boys.

"What?" Derek asked stepping closer, I shook my head and raised my ear higher.

"Emily?!" my eyes widened at the sound of a girls voice and I knew the boys heard it to, we didn't question it and took off towards the sound of the voice because if we heard it then no doubt Boyd and Cora would have as well.

Scott was in front and jumped over Isaac who had caught up to us and found Cora first even if it was only a few seconds ahead and kicked Cora away who by the looks of it had been about to attack a girl camping in the woods, Derek and I caught up quickly and Derek immediately roared at Cora trying to get her to submit but it didn't look like Cora was willing to so I growled and flashed my fangs and glowing yellow eyes at her along with Derek this times and she finally took off so Isaac, Derek and I started running after her but we we're quick to lose her again.

"This is impossible" I grumbled kicking a stone with my feet just as Scott caught up to us, I shook my head and he sighed but then his phone started buzzing.

"Stiles now's not…"

"Lydia found a dead body at the pool" I heard Stiles interrupt him. "It looks like they killed someone"

"Are you sure?" Scott asked him.

"Yup, throat ripped out, blood everywhere, it's like the freaking Shining over here, if two little twin girls come out of the woods and start asking me to play with them forever and ever, I'm not gonna be surprised" I rolled my eyes as I scanned the trees hoping to catch a glimpse of either Boyd or Cora but knew she was long gone by now.

"Can you get a little closer to make sure it was them?" Scott asked him.

"Make sure it was them, Scott who else is going around ripping throats out?" Stiles spat back at him so I growled then stepped forward and grabbed the phone off Scott.

"Just do it Stiles!" I replied growling into the phone.

"A lot of blood" he sighed "He's wearing a purity ring…"

"Stiles how many wounds does he have?" I asked rolling my eyes, I didn't care what he was wearing.

"One giant cut across the throat…that's it" I frowned as that wouldn't make any sense if it was Boyd and Cora.

"There's no other claw or bite marks on the body?" I asked him just to make sure.

"No not that I can see"

"His clothes aren't shredded"

"No Skye they're not!"

"Okay thanks Stiles" I hung up the phone and walked back over to the boys.

"This doesn't make any sense" I heard Derek say. "The public pool is all the way on the other side of the woods, we haven't tracked them anywhere near there"

"Derek they killed someone" Scott argued with him.

"How are they moving that fast" Derek continued as if ignoring Scott

"Derek-" Scott tried again

"They can't be that fast on foot!" Derek exclaimed cutting him off.

"They killed someone!" Scott kept insisting. "Some totally innocent kid is dead"

"Actually they haven't…not yet" I cut in giving him back his phone. "Stiles said it was one wound across the throat and don't get me wrong but that doesn't scream werewolf especially one under the full moons pull"

"She's right they would have torn him apart to the point you probably wouldn't be able to identify him" Derek replied backing me up making me smile at him.

"But the blood?" Scott asked

"He was cut across both carotid arteries Scott and those arteries are the main blood supply for the brain so of course there was a lot of blood" I shot back angry, ever since he betrayed me with Gerard we haven't been close and it was hurting me every time it was proven.

"We need help" Scott replied.

"We've got Isaac now" Derek pointed out.

"I mean real help" Scott protested and I watched as Isaac gave him an offended look.

"Nice Scott" I muttered.

"They're too fast for us, for all of us, they're too strong too rabid" Derek shook his head at Scott.

"We'll catch them"

"What happens if we do?" Isaac cut in. "We're just gonna hold them down until the sun comes up?"

"Maybe it would be easier just to kill them" Derek sighed.

"No!" I protested glaring at him. "Killing them isn't the right thing to do and we're not losing anybody else"

"What if it's the only thing to do?" Isaac asked turning to me. "If we can't even catch them, what else do we do?"

"Find someone who knows what they're doing" Scott replied, I turned to him my eyes widening as I knew exactly who he was talking out.

"Who?" Derek asked clearly not realising who he was talking about.

"He won't help us" I spoke up but Scott smirked.

"Someone who knows how to hunt werewolves" I rolled my eyes because I was really getting sick of being ignored.

"How do know he'll even agree to help us, especially us" I motioned to me and Derek since we weren't exactly high on Argent's list of favourite people.

"If it means innocent people not getting killed then he'll help" I rolled my eyes but we followed him and found Argent loading groceries in his car so Scott got out of Derek's car and approached him but Argent was quick to pull a gun on him.

"Do you think this is gonna work?" Isaac asked Derek leaning forward in between the front seats

"Nope" Derek and I replied at the same time.

"So you're uh…your sister?" Isaac started and Derek looked over at him raising his eyebrows and I couldn't help smile. "Sorry yeah…it's…" Isaac cleared his throat shaking his head. "It's bad timing, I'm sorry" Derek looked back towards Scott "I'll ask later, it's fine" I laughed quietly when Derek turned back with an even bigger glare. "Or never…yeah I'm good with never" I turned back to Isaac.

"You are aware it's his baby sister right"

"I was just asking" I rolled my eyes as I turned back to the front and focused my hearing

"First of all why would I care about anyone related to Derek and second I don't know this kid Boyd, I don't even know his last name" I frowned at Argent's words because I knew he wouldn't help us and this was just wasting time.

"Boyd is his last name" Scott replied.

"What's his first name?" Argent asked him.

"Vernon" I rolled my eyes.

"This is so not getting us anywhere" I muttered to myself but saw Derek look over at me.

"…is there still a reason the gun is still pointed at me?" I heard Scott ask Argent when I focused back in on their conversation.

"There's probably still part of me that wants to shoot you" Argent replied.

"I get that" I rolled my eyes at Scott's reply.

"This is wasting time" I squeezed my fists together as I watched Argent put away the gun then walk closer to Scott.

"Scott I watched my father brainwash my daughter almost turn her into a killer, that world, your world decimated mine, my wife, sister, father, my entire family" I growled because none of that was our fault. "Why would I ever step foot in it again?"

"Because people are going to die" Scott replied. "And because you know how to catch Boyd and Cora without killing them"

"I'm sorry I can't help you" Argent replied making me growl until I felt Derek grab my hand and uncurl my fingers out of the tight fist which made me look down and see my claws had cut into my palm, I looked up when I saw Scott getting into Argent's car then heard my phone buzz so I looked down at it.

"Follow, I have a plan" I read the text aloud so Derek started following Argent's car.

We followed it to the pool which actually made me smile because it was smart, show Argent the body, make him think they did it and hopefully it would make Argent compassionate enough to wanna help us, they started driving off again and I got another text.

"Argent's in, go to the last place we saw them and we'll meet you there" I read aloud again.

Derek was again quick to drive back to preserve to the last place we'd seen Cora and pretty soon Argent and Scott we're walking up and Argent dropped a bag to the ground before bending down.

"You're tracking them by print?" Chris asked us.

"Trying to" Scott nodded.

"Well then you've been wasting your time" I scoffed because I already knew that. "There's only one creature on earth that can visually track footprints and that's man and if you're not trained like me, you have no idea that this print is Boyd's and these…"

"Are Cora's" Isaac interrupted pointing at the tracks in the mud.

"Nope…they're yours" Argent replied. "You trampled Cora's as soon as you walked over here, listen I know the four of you are focusing half your energy on resisting your own urges under the full moon but that puts you at a severe disadvantage to Boyd and Cora, who have fully given in, they put the petal to the floor while you four are barely hitting the speed limit"

"So what do we do?" Derek asked tightening his hold on my waist.

I was standing in front of him with his arms wrapped around my waist, he had pulled me closer when Argent walked up to us and I knew it was to both protect me from Argent who he still didn't like or trust and because he needed me closer to stay in control like I needed him to stay in control since we we're each other's anchors.

"Focus on your sense of smell, actual wolves are known to track their prey-"

"By up to a hundred miles a day by scent" I cut in and finished for him, he smiled at me then turned back to the boys

"A trained hunter can use scent to track them, if the wind is with them wolves can track a scent by a distance of two miles, which means we can draw them to us or into a trap" he tossed a net at Scott. "Full moon does give us one advantage, they'll have a higher heat signature which makes them easier to spot with infrared" Chris tossed Scott, Isaac, Derek and me a pair of infrared goggles.

"Thanks but…I've got my own" Derek replied glowing his red eyes at Argent making me smile. "

Just remember, we're not hunting wild animals underneath those impulses are two intelligent human beings, don't think they can't rely on that human side, it's suppressed but it's there, reminding them how to mask their scent, how to cover their tracks, how to survive" we walked over to a ledge and could see the entire town of Beacon Hills lit up from the streetlights. "When's the last time you saw your sister?" he asked looking beside him to Derek

"Not in years, I thought she died in the fire" Derek replied, I squeezed his hand.

"Do you feel like you have a lock on her scent?" Derek shook his head. "Scott, Skyler how confidant are you in your skills?"

"Honestly most of the time I'm trying not to think about all the things I can smell" Scott replied so Argent looked towards me but I shook my head at him.

"I'm still just barely learning" I replied and felt Derek grab my hand squeezing it.

"All right" Argent sighed. "The problem is that when they breach the woods and hit the residential area, once they're past the high school they're right in the middle of Beacon Hills"

"They're not gonna kill everything they see, are they?" Isaac asked him.

"No" Argent replied. "But there is an important difference to recognize, wolves hunt for food at a certain point they get full, Boyd and Cora are hunting for the pleasure of the kill for some primal apex predatory satisfaction that comes from the ripping of warm bodies to bloody shreds and who knows when that need gest satiated"

"We can't kill them" Scott cut in.

"What if we can't catch them" I looked up at Derek with a growl because I don't know how he wasn't showing any compassion this was his sister after all.

"Then maybe we just need to contain them" Argent replied. "There's no one in the school at night is there?"

"You want to trap them inside?" Derek asked him.

"If there's somewhere with a strong enough door, no windows or access to the outside" I thought about it for a second.

"What about the boiler room?" Isaac spoke up before I could. "It's just one big steel door"

"You sure the schools empty?" Argent asked us again.

"It has to be, there can't be anyone there this late, right?" we looked down at the bright lights of the school before we returned to Argent's car to get more supplies, he opened up the back tailgate then got something out of a black case then stabbed it into the ground.

"These are ultrasonic emitters, it's one of the tools we use to corral werewolves pushing them into a direction we want them to run" he pushed the button on the top and all four of us werewolves grabbed our heads covering our ears in pain. "Gives off a high pitched frequency that only they can hear"

"Agh no kidding" Isaac groaned.

"Turn it off, turn it off" I begged and he smirked pushing the button on the top again turning it off before pulling it out of the ground and stood up then started grabbing more out of his car.

"These are gonna drive them to the school?" Derek asked hesitantly taking two.

"And then it's up to you to get them into the basement" Argent replied giving two to Isaac.

"Does anybody want to rethink the plan where we just kill them?" I growled at him and he flinched back.

"It's going to work" I looked up and saw Derek look at me questionably "It'll work" Argent gave two to Scott before closing his tailgate.

"Skyler you come with me, we'll check to make sure the schools empty" I nodded and made a move towards Argent's car but Derek grabbed my hand giving everyone else a look and they quickly dispersed.

"Be careful please" I nodded quickly hugging him.

"Don't worry about me okay" I walked over and hopped into the passenger seat watching Derek leave before Argent started driving towards the school keeping my mouth shut as Argent set a few up along the way dropping them out his window then we finally pulled up in the main parking lot where the students parked, I got out and was about to head into the school to check whether or not it was empty.

"Skyler" I looked up at Argent. "Get in and get out as fast as you can, I don't want Derek killing me because you got hurt" I smiled nodding a little then took off inside running down the corridor's but then noticed a light on in Ms Blake's room so I quickly ran up but she wasn't in there.

"Ms Blake?" I called but got no answer, then noticed her printer was beeping saying it was out of paper and was quick to put two and two together, she would have needed more paper which teachers keep in the supply closet which is…in the boiler room. "Oh shit!" I took off down the stairs and ran into the supply closet startling her. "Ms Blake you have to get out of here"

"Miss Blakesley what are you doing here this late?"

"That doesn't matter, something's about to happen" I had no way to explain what. "Just trust me" she hesitated. "NOW RUN!" she dropped her stuff and ran out of the boiler room, I sighed in relief then grabbed my phone and started texting Derek telling them the school was clear then made the move to leave but the sound of the steel door opening made me panic then jumped at the sound of fire extinguishers.

I heard growling and snarling echoing through room then a few seconds after the extinguishers stopped I heard the steel door shut and lock and my eyes widened when I realised what just happened, they'd already brought Boyd and Cora down here and just locked me inside with them. I quickly sent a new message saying that I was still inside but had no signal and realised the first message hadn't even sent but before I could do anything else I heard a growl almost right in front of me so I looked up and saw Cora and Boyd coming towards me.

"Ah for fudge sake" I rolled my eyes then flipped out my claws and prepared myself for a fight.

Derek's POV

Scott and I had just shut the steel door before leaning against the door as Cora and Boyd started banging against the door trying to get out but it suddenly stopped and they were trapped.

"Did that actually just work?" Scott asked.

"It worked" I replied turning to look at him then stepped back when I realized that Boyd and Cora weren't going to break down the door so I leaned against the wall opposite to the door as Scott leaned into the door. "What are you hearing?" I asked, Scott pulled back and looked at me wide-eyed.

"Heartbeats"

"Both of them?" I asked sighing.

"Actually three of them" he leaned in then quickly leaned back looking at me "Derek that's Skye's heartbeat" I jumped up.

"What, Skye's in there?!" I leaned in and listened myself and sure enough it was Skye's heartbeat, I'd know that sound anywhere so I got ready to open the door because I wasn't leaving Skye to defend herself.

"What are you doing?" Scott asked me.

"Skye can't fight both of them off by herself, I need to go in, close the door behind me and keep it shut" I sighed and braced myself.

"You go in there alone and you're either going to kill them or they kill you" I paused before looking over at him.

"That's why I'm going in there alone, this is the only way to save her" I opened the door and ran inside while Scott shut it behind me and locked it.

Skyler's POV

I growled and crouched ready to spring at the first sign of their attack but then I saw a mass hit both of them sending them flying into another part of the boiler system.

"Derek?" he looked up then grabbed the cage door and pulled it shut. "No what are you doing?" I rattled the cage but it locks from the inside and he'd just locked me inside. "Derek don't do this please" I begged.

"I'm sorry Skye I have to" they moved further into the boiler room where I couldn't see but I could hear their growls and the sound of flesh being torn apart.

"No, DEREK!" I shouted and hit my fists against the wire gate desperately trying to break it down, I knew what was going on and continued trying to break the door because I couldn't sit back and let this happen. "DEREK!" I screamed loudly hearing it echo through the boiler room.

"I'm sorry Skyler" I heard Derek whisper and I knew he meant that as a goodbye which filled me with fear but also power to get to him. I shut my eyes and let the power wash over me, I opened when I felt the extra power and knew my eyes we're now blood red signalling my rise to the power and strength of an Alpha so I let out a roar then broke the door easily and ran towards the fight where I let out a furious howl.

I watched as Cora dropped Derek who fell to the ground looking barely alive but couldn't dwell on him long enough because Cora moved towards me but I kicked her down to the ground except she was quick to stand up and try to attack me again so I grabbed Cora's wrist and held her away from my body before I let out a vicious roar even though it didn't faze her.

Boyd moved in for the attack along with Cora but I was managing to dodge out of the way of their claws a few times before they became too hard to dodge and received a few slashes along my arms and sides.

I was trying my best to keep them away from Derek and was starting to lose stamina but then light flooded the boiler room as the sun finally rose and Boyd and Cora both slumped to the ground unconscious as they shifted back which exhausted them, I sighed in relief but then I remembered Derek making me turn around to face him.

"Derek!" I slid to the floor in front of him and lifted his face to meet mine "Look at me" he looked up and a weak but painful smile spread across his face "Don't smile, I'm going to kill you!" I shouted at him just as we heard the boiler room open, we turned around looking at Isaac and Scott standing there, both we're looking at me with a shocked expressions and I knew it was because I was staring at them with glowing red eyes.

"Get them out of here" Derek ordered weakly, Scott and Isaac grabbed Boyd and Cora then took them out of the room so I turned back to Derek.

"What the hell we're you thinking?" I felt fresh tears roll down my cheeks. "They could have killed you Derek"

"I know" he replied which just angered me more and I shoved his shoulder "Ow" he groaned in pain but at the moment I didn't give a shit.

"I don't give a shit Derek never do that again, we're in this together remember" he looked up with another small smile.

"Now more than ever" he painfully reached up and stroked my cheek. "These are beautiful on you" I felt myself smile as I leaned into his touch but then I remembered I was angry at him.

"I'm still angry at you Derek Hale" I grabbed his arm then put it over my shoulder before standing and half walked half dragged him outside to his car. "You ever do that again to me again and I'll be the one killing you" he laughed quietly.

"If it's to save your life then I can't promise you that" I rolled my eyes but set him into the passenger seat with Isaac already sitting in the back with Boyd and Cora slumped still out cold beside him.

I drove them back to the loft and Peter came out grabbing Cora while Isaac dragged Boyd upstairs with Peter carrying Cora while I half dragged-walked Derek upstairs but he'd already started healing so it was easier. Everyone stayed upstairs so I set Derek on his bed then made sure that his injuries were healing before sighing in relief and laid my head on his shoulder, he rubbed my back as I started to cry again.

"You can't do this to me again Derek" I whispered against his chest.

"I couldn't let you fight them alone" I growled as I looked up.

"I'm not angry that you came into the room Derek because I would have done the exact same thing if it was reversed, I'm angry because you shut me in the supply closet…you shut me out and nearly got yourself killed" I stood up and started pacing in front of him. "How would you like it if I did that to you huh"

"Skye-"

"No you don't get to speak and charm your way out of this one mister, you have no idea how scared I was…how much I feared that when I broke out that it was already too late, you can't do that Derek"

"Okay I'm sorry!" he yelled cutting me off then stood even though it looked painful "I'm sorry Skye, I was just trying to protect you" I glared at him. "You we're already hurt from the vault and I didn't want to see you hurt again"

"You we're hurt just as bad as I was in the vault Derek so that is not a good enough reason"

"I'm an Alpha it's different"

"Yeah well now so am I" I replied glowing my eyes at him. "So from now on we fight together in everything and if you ever pull another stunt like tonight I swear to god-" he pulled me into his arms and kissed me silencing any argument.

"I promise okay" I sighed then kissed him again wrapping my arms around his shoulders.