Flowing with the moon's energy, I stayed in front of Derek and Scott with ease. I skidded across the forest floor and under a tree, kicking up dry leaves as Scott flipped through the opening of the branches in the tree on the right and Derek jumped through the branches on the left side of the tree. Derek stared down at a spot in the mud and I looked to see a clear footprint in the ground.

"Is it them?" I asked him.

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

"Is that gonna make it easier or harder to catch them?" Scott inquired.

"I don't know."

"Derek...I saw Boyd try to rip two little kids apart. Are they gonna do that to everyone they find?"

"Everyone and anyone." He stalked off into the woods and Scott and I had no choice but to follow him.

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Scott split away from us as we broke into a clearing to see Cora roaring at a terrified camper. Derek and I stepped out from the shadows and his canines sharpened as he roared and Cora roared back. Growling again with a deeper, threatening tone, Derek snapped his jaws together making his teeth click and Cora turned to run back into the woods. Derek raced after her and I walked over to Isaac who appeared moments before.

"Go home, Isaac." I snapped. "You're not up for this."

"Calla, I know you want to protect me but admit it, you need my help." He said. I sighed and nodded.

"Fine, but don't come crying to me if you end up dead." We turned to race after Derek and Cora but stopped when we saw Derek just standing in the shadows.

"I lost her." He breathed. Scott's phone vibrated in his pocket and he pulled it out and answered it when he saw it was Stiles. It was quiet for a moment as Stiles spoke.

"Are you sure?" Scott asked. "Can you get a little closer to make sure it was them?" Another pause. "Please just do it." Scott hung up and turned to us. "Stiles and Lydia found a dead body at the public pool with his throat slashed."

"This doesn't make any sense. 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."

"How are they moving so fast."

"Derek."

"But they can't be that fast on foot."

"They killed someone. Some totally innocent kid is dead...and it's our fault."

"It's my fault."

"Don't talk like that, Derek." I scolded him. "It's Erica and Boyd's fault. They should have stayed with the pack instead of wondering off."

"We need help." Scott stated the obvious.

"We have Isaac now." Derek said.

"Who should be at home resting." I snapped, glaring at Isaac who looked away from my piercing red eyes.

"I mean real help." Scott restated. "They're too fast for us, for all of us. They're too strong, too rabid."

"We'll catch 'em." Derek said.

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

"Maybe it would be easier to just to kill 'em."

"Derek, this is our pack we're talking about." I snapped. "Killing them isn't the right thing to do."

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

"FInd someone who knows what they're doing." Scott said.

"Who?" Derek questioned him.

"Someone who know how to hunt werewolves."

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"You're tracking them by print?" Chris Argent questioned us as he knelt down to the footprint that we found earlier.

"Trying to." Scott said.

"Well, then, you've been wasting your time. 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 finished as he leaned up against a tree.

"Nope. They're yours." I groaned with irritation, letting it turn into a growl as I let the moonlight get to me. I rubbed my eye in frustration. "You trampled Cora's as soon as you walked over here. Listen, I know the four of you are focusing half of 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 pedal to the floor where you four are barely hitting the speed limit."

"So what do we do?" Derek asked.

"Focus on your sense of smell. Acutal wolves are known to track their prey by up to a hundred miles a day by scent. 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." Chris picked up a bundle of black rope netting and tossed it to Scott who caught it. "The full moon gives us one advantage. They'll have a higher heat signature, which makes them easier to spot with infrared." Chris picked up three pair of goggles and tossed one to Isaac, Derek and me.

"Thank, but we've got our own." Derek and I flashed our neon red lights at him and he smirked.

"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. When's the last time you saw your sister?"

"Nine years. I thought she died in the fire."

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

"Honestly, most of the time, I'm trying not to think of all the things I can smell." He answered.

"All right. The problem is 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 questioned Chris.

"No. 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 blood shreds. And who know when that need gets satiated?"

"We can't kill them." I said.

"What if we can't catch 'em?" Derek asked me. I looked up at him, arms crossed over my chest and red eyes glowing.

"We're not killing them, Derek."

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

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

"If there's somewhere with a strong enough door, no windows or access to the outside."

"What about the boiler room?" I said. "It's just one big steel door."

"You're sure the school's empty?"

"It has to be." Scott said. "There can't be anyone there this late, right?"

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"These are ultrasonic emitters." Chris informed us as he stabbed a slender metal rod into the ground with a blue blub on top. "It's one of the tools we use to corral werewolves, pushing them into a direction we want them to run. Gives off a high-pitched frequency that only they can hear." Chris pressed the bulb on top of the rod and a high pitch squealing sliced my eardrums. The sound sounded like a dying cat, nails on chalkboard and squealing of tires all rolled together to make on noise. I squinted my eyes in pain and clamped my hands over my ears to try to block the noise. Derek, Isaac and Scott had the same reaction.

"God, no kidding." Isaac groaned. Chris got up and went to the back of his car to hand two rods to each of us.

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

"And then it's up to you to get them into the basement." Chris added.

"Does anyone else want to to rethink the plan where we just, uh, kill 'em?" Isaac pointed out. The moon alone was making me irritated and having Isaac and Derek thinking that killing them would solve anything wasn't helping at all. I jabbed Isaac in the chest, my eyes growing brighter and my canines sharpening.

"I don't want to hear another word about killing Boyd and Cora." I growled. "Boyd's your packmate and Cora's your alpha male's sister and you best remember that, Isaac." I turned my head sharply to Derek. "It goes the same for you too, Derek Hale." Derek held his hands up in defense knowing that if he objected and we got in a fight, the strength of the full moon would be on my side and I would win. "This plan is going to work." Chris handed two emitters to me and I snatched them from him.

"It'll work." Scott agreed.

"Scott, you go right. Flank around and meet at the school." He nodded and disappeared in the shadows. "Isaac, you do the same going left." He agreed and followed the moonlight. "Derek and I will go straight towards the school while Chris takes the dirt roads." I took off running, the forest scent filling my lungs. I could hear Derek panting behind me as he struggled to keep up with my speed. If it was any other day, it would be me that would be struggling to keep up with him but the moon was on my side tonight. Derek tossed an emitter into a tree as he passed it and I growled as it squealing. I slammed one down into the ground before leaping over a boulder and sliding down the other side and immediately started running as soon as my feet hit the ground.

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Derek tossed the last emitter and stood up in the darkness. I stood a couple feet away from him and looked at his figure. His broad shoulders followed perfectly down into his firm, strong biceps. I opened my mouth to say something but another voice spoke before me.

"And the hunted becomes the hunter." Derek and looked behind us to see Peter walk into the moonlight. I growled and Derek walked towards me to push me slightly behind him. "You really think a few high-tech dog whistles are gonna help?"

"I don't see you offering hand." Derek snapped.

"Personally, I'm trying to cut down on futile endeavors."

"Cora's alive."

"I heard. Let's throw the reunion party when she's not an unstoppable killing machine."

"We can stop her." I said, clinging to Derek's upper arm as I peered out from behind him at Peter.

"Sure you can. By killing her...which happens to be the point of this little exercise. Deucalion wants you to kill them. He wants you to get rid of his baggage, making it easier for you two to join his pack. The fact that is was supposed to happen in the vault, and not up here, out in the open, doesn't change his plan. It just means that Boyd and Cora are going to kill a few innocent people first."

"And we should just let them?" Derek inquired. "We should be okay with innocent people dying?"

"Unless you're okay killing your own."

"We can catch them." I insisted.

"Oh, come on. How much damage can they do? So they off a few homeless people. A drunk stumbling out of a bar too late. So what? Let Scott deal with it. Let him be the hero of his morally black and white world. The real survivors, you, Calla and I, we live in shades of gray. Then again, even if you did kill them, you're still an alpha." Peter bent down to press the bulb on the emitter making me growl involuntarily at the noise. "You can always make more werewolves."

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Isaac stood outside the school in the lawn while Chris and Scott waited in the parking lot. Derek ran inside the school and I stayed outside the doors. Howling sounded in the distant and then a horn followed by snarling that got closer. Boyd and Cora appeared and just outside the doors like they were deciding whether to take on Derek or not. Getting impatient, a roar boiled inside my chest and I let it out, not anticipating on how loud it would be. They jumped on to the roof and climbed up the wall of the school.

"Oh, great, I think I just scared them over the school." I groaned, watching them disappear into the shadows. "Lets go." Derek and I ran to the front of the school to meet up with Scott, Chris and Isaac.

"The red doors, someone has to get them open." Chris said and Derek ran back into the school to the red doors.

"Someone has to drive them inside." Scott said.

"Isaac, go." I ordered and he obeyed while Scott, Chris and I followed Derek through the school. The snarling of Boyd and Cora echoed through the empty halls as they got nearer. Boyd whipped around the corner with Cora closley on his heels. Derek slammed himself into his younger sister's side, slamming her into the wall causing her to fall to the ground. Boyd turned around and growled as Cora got to her feet and turned to us, growling too. Scott, Derek and I stood side by side facing the two rabid werewolves. I let out a small, soft but menacing, taunting growl.

"Come and get us." Derek taunted them. Derek took a sharp right down the steps taking them three at a time with Scott and I behind him and the snarls following closely behind. He opened the boiler room and we disappeared inside as the pounding of feet sounded on the concrete steps. The door closed as they entered and two pairs of neon yellow lights floated through the darkness. As they came closer, Derek took a fire extingusher and sprayed them with the carbon dixode. They screamed as they put up their arms around their faces to try to protect themselves from the harmless smoke. As they were distracted by the smoke, Derek dropped the extingusher and we ran back through the boiler room and back out the door and slammed it shut and locked it before Boyd and Cora could follow us. Thudding sounded on the other side of the steel door as Boyd and Cora struggled to get out but then stopped.

"Did that actually just work?" Scott asked.

"It worked." I threw my head back and let out a relieved laugh as Scott leaned against the stone wall and Derek slid to the sit on the floor in the corner, exhausted. I leaned against the steel door and pressed my temple to the cold metal. I closed my eyes and just before I could actually relax, something caught my hearing. I opened my eyes and perked my ear as I listened closely. Pressing my ear closer to the door, a thumping sounded inside the boiler room. "What are you hearing?"

"Heartbeats." I answered quietly as I listened.

"Both of 'em?" Thump, thump, thump, thump. Boyd's heartbeat. Thump, thump, thump, thump, thump, thump. Cora's heartbeat. Thump, thump...thump, thump...thump, thump. A third heartbeat.

"Actually...three of them."

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Derek stood up and walked over to the door and grabbed the handle. I grabbed his hand and pulled it away from the door and looked up at him like he was crazy.

"What are you doing?" I questioned him.

"Close the door behind me and keep it shut." Derek said.

"Derek Hale, no. I'm not letting you walk into a death trap. It's suicide, Derek! You go in there alone, and you're either gonna kill them, or they kill you."

"That's why I'm going in alone." He began to open the door but I slammed my palm into the door closing it against his pull.

"Don't be stupid, Derek. Please." He looked down at his feet unable to meet my still glowing red eyes. "Look at me." He ignored me. "Look at me." He slowly lifted his head at me with eyes of apology and hurt. "I'll go." He groaned and cupped my face in his hands, pressing his forehead against mine. I sighed and rubbed my hands along his collarbone as he closed his eyes.

"Lily, you-"

"Derek, at this moment, I'm stronger than you and Scott combined right now. If it was any other night, then I would have let you talk me out of it but an alpha female is stronger than the alpha male on full moons. Remember?" He stayed silent and kept his eyes closed.

"They'll kill you, Calla Lily."

"I'll be fine, Dare. I love you." I stood on the tip of my toes and kissed his forehead. He moved to kiss me on the lips as I rolled back onto the balls of my feet but I pulled away from him and smiled. "Save it for when I come out." He forced a smile as he let go of my face. I turned to the door and took a deep breath before opening the door and stepping inside with thed door shutting me in the darkness. My red eyes were like flashlights in front of me as I slowly walked through the dark tunnel. The air was heavy and humid, droplets of water dripping from the roof of the tunnel and dripping onto my white blonde hair as I exited the tunnel. I continued to the back of the boiler room where I saw Cora and Boyd growling and snarling at a Miss Blake who stood petrified, staring at Boyd and Cora. I ran forward and slammed myself into Cora who bumped into Boyd, knocking them both away from Miss Blake who ran to the back of the storage room. Cora fell to the ground and Boyd slammed his head against a pipe. They both turned to me and snarled and I knew what I had to do. I had to let myself go to the full energy of the moon in order to fight them and survive. I snarled at them and Cora charged at me and I slammed my fist into her chest knocking her back as Boyd came at me. He swung his claws at me and I didn't jump back fast enough for his claws to rake through my flesh. I howled in pain as I scratched his left cheek. Cora came up behind me and clawed my back. I whimpered as I grabbed her arm to stop her from attacking again and turned to Boyd and slammed my arm into his to push it down and away from me so I could grab him by the neck to hold him back. I bared my teeth at him as I struggled to keep both of them away from my body. Boyd opened his mouth to roar but my throat vibrated as I roared louder than him in hopes to scare him off but he snapped his teeth at me, still wanting to rip my throat out. Cora ran his claws over my stomach and Boyd tore skin from my body too. Like they were taking turns, one hit after another, every second a new scratch mark appeared on my body. The energy of the moon was fading from, leaving my side, leaving me defenseless. I grew with each new scratch and my knees collasped underneath me but I still kept a firm grip on Cora and Boyd. I let out one last small defenseless roar. "Derek." Just when I thought I was going to pass out, the scratching stopped and Cora and Boyd fell to the ground unconscience. My hands untangled from their necks and drooped by my side. The heat from the window behind me told me that dawn was arriving.

"Calla!" I tried to lift my head to the sound of his angelic voice as his footsteps got louder but I didn't have the energy. The moon...Cora...Boyd...they all took it from me. "Calla!" He voice sounded closer and I tried to stand up to meet him half way but I started tumbling to the ground. Derek rushed forward and scooped me up into his arms before I could hit the concrete. "I got you, Lily. I got you. You're ok. You're fine. You'll be ok." I wrapped my arms around his neck as he pulled me tightly against his chest. "Get them out of here." Scott took care of Boyd while Isaac grabbed Cora as Derek began to carry me out of the boiler room.