AN: So here I am with another story that is borrowing emebalia's character Luis. But this time I'm changing the pattern. AU to her universe, no 1st person POV. Luis calls in the help of the Winchesters when strange animal attacks occur in his home town. Takes place a while after my story Teamwork. A big thank you for emebalia for letting me use her character again. And an awesome thank you to NerdAngel for her support and encouragement, as well as LilyBolt and ChicoThorn for their support on my first story. This is for you, guys! ENJOY!

Disclaimer: I own neither the boys nor Cas nor Luis

***sn***

Jesse Simmons had had enough. He certainly didn't consider himself the overly jealous type, but what his girlfriend Sheila had been doing in the club was going too far. Jesse had no problem with Sheila dancing with old friends, hugging and all, but the way she had thrown herself at her ex-boyfriend Donny had been too much.

Jesse had taken Sheila aside to tell her he wasn't happy with her behavior, but she had just brushed him off saying he had nothing to be jealous about and that it was her business who she hugged, kissed or danced with. Before Jesse had a chance to explain what exactly bothered him, the blonde had left him standing on the spot and returned to her ex, making sure Jesse got a good look at her kissing this Donny on the lips.

Shaking his head, Jesse returned to his friend Jacob and his date to let them know he'd be leaving. Jacob tried to make him stay, but Jesse needed to think. He stepped out of the club, breathing in the fresh, rain-washed air. The ground was still wet from a downpour and he headed towards the main street.

A noise, like a growl, made him stop in his tracks. Looking around, he let his eyes adjust to the darkness. The next street lamp was flickering and didn't do much to help him make out his surroundings. Wasn't there something moving in the shadows?

Jesse quickened his pace to get into the safety of the busier main street. Hearing a noise behind him, he looked over his shoulder, but the scream he wanted to utter died in his throat when a clawed hand caught him on the temple and everything turned black.

Jacob left the club through the same door Jesse had. He was worried about his friend. The story with Sheila was eating on him. Jacob didn't like to see his friend heart broken. But he also didn't understand what Jesse saw in Sheila in the first place. Jacob told his date he'd be right back and stepped onto the street.

A rustling in the leaves of the trees opposite the club made him look up. Straining his ears, Jacob picked up more noises, like something being dragged over the ground.

"Jesse?" he called. "Is that you? Everything alright, man?"

Silence met his ears. Not even the rustling was audible anymore. Cautiously Jacob stepped towards the edge of the small row of trees. In the dim light he thought he could make out a figure under the trees. Or was it two? Taking another step, Jacob's foot kicked against something small on the street, which skittered a few steps further with the force of the kick.

Bending down, Jacob realized it was a cellphone. He squinted his eyes. It was Jesse's phone. A low moan reached Jacob's ears and his hand darted to the butterfly knife in his pocket. He'd never thought he'd have to use it, but this here was creeping him out.

"Jesse?"

Another soft moan, from the ground area of the trees, filled the night air. Jacob felt a shiver running down his spine, but he kept walking. The moan now was accompanied by a growl unlike anything Jacob had ever heard. The street light flickered on again, suddenly illuminating the treeline.

"Jesse," Jacob gasped as he got a look at his barely conscious friend, chest ripped open and bloody. Was that his ribs he could see, shimmering sickly white through the bloody mess? Before he could think any more about it, the second figure peeled from the shadows.

Jacob felt his blood run cold when he took in the creature's appearance. Distorted features he couldn't really make out. Fangs, claws... and blood.

"Jacob?" A female voice was calling him, distracting him. Jacob turned to look at his date and never saw the attack come. White hot pain flooded his body and the piercing scream of his date was the last thing Jacob heard in his life.

***sn***

Dr. Luis Waiden was on his way across the parking lot towards the hospital where his shift would start in about thirty minutes time. It was only five thirty in the morning. He hated those early shifts, especially if they followed a six hour break after a forty-eight hour shift. It was winter and no traces of sunrise were anywhere close to being detected. The only light came from the silvery beams of the full moon, illuminating the area unhindered by clouds.

The moment his hand touched the handle of the door leading to what he called the chill out area for docs, his beeper went off. Luis cursed quietly and fumbled to check the offending device. General alert, all hands on deck, he thought and mentally kicked himself for switching on the beeper the moment he left his house. He hated starting a shift off in a rush. Nevertheless, the always eager ER doc quickened his steps and after changing in record time he hastened to the ever busy ER.

"Luis!"

Looking up, Luis saw a red haired female colleague running towards him, an urgent look in her eyes.

"Ashleigh," Luis called. "What's going on?"

"Trauma 2, young man with open chest trauma. Steve is there already. He needs help." Ashleigh waited long enough to see Luis nod and dashed off to vanish in trauma 5.

Jogging the few steps to his destination, Luis entered and headed to the sink to disinfect his hands.

"Steve, what do you need me to do?"

***sn***

It was just after 10 am when Luis finally had a moment to himself, to breathe and sit down with a mug of much needed coffee. He inhaled deeply and with dismay noticed that his hands were slightly trembling, making the coffee slosh around in the mug.

Luis took a sip and rested both his arms and the mug on the table in front of him in an attempt to still the tremors. To his relief they quickly subsided. Luis closed his eyes, trying to get the last few hours out of his head by thinking of more pleasant things than blood and more blood.

The sound of a chair being pulled up drew him back to reality. Opening his eyes, he saw Steve taking a seat next to him.

"How are you doing, Luis?" Steve was a few years older than Luis and had been working at this hospital since he was out of med school.

"I'm good," Luis sighed, stretching out his legs. "I'm glad we managed to save that boy."

"Yeah, so am I," Steve replied. "Never seen an injury like that before. No bear or cougar attack that leaves these kinds of marks and patterns."

"Maybe the boy can tell us what attacked him when he wakes up," Luis mused. A shadow fell over him and he looked up. Steve followed suit.

"Jack," he said as way of greeting. Dr. Jack Chambers was the head pathologist of the hospital. "What brings you up here to the land of the living?" Steve chuckled at his own joke.

"I've been having a weird day," Jack replied with a frown, "and I've heard yours was in the same line so far."

"How do you mean?" Luis frowned and Steve's expression was a carbon copy.

"Well," Jack pulled up a chair and sat down. "I just had to do an autopsy on a young man, chest ripped open, claw marks, teeth marks, crushed ribs." Luis and Steve exchanged a meaningful look.

"Sounds just like the boy we just patched up," Steve said, scratching the back of his head. "So two animal attack victims in one night..."

"Something out there is hungry," Luis murmured to himself.

"What?" Steve frowned at his colleague.

"I bet there was one difference, though," Jack cut in.

"Difference?" Luis and Steve echoed. "Yeah, our guy was still alive," Steve added.

"Exactly," Jack said, tapping his finger on the table. "That's because my victim was missing his heart."

***sn***

"Sammy?" Dean pulled his pillow over his head to drown out the offending ringing of his phone on the table. They had been out the whole night hunting down an elusive black dog. Dean felt sore all over and just wanted to sleep, so why the hell did Sam not pick up that damned phone?

Realizing the phone won't stop ringing, Dean dragged himself out of bed, cursing whoever dared calling him at this time after a hunt. Sitting up, Dean noticed his brother was missing along with the Impala keys.

"You'd better be getting breakfast, Sammy," Dean growled at the empty room and stretched for the phone. Pausing a moment to stare at the caller ID, Dean frowned.

"Luis?" Dean groaned, answering the call. "You'd better be dying, cause I swear if you're just calling to hear the football results you will be dying when I'm through with you."

"Dean? I'm sorry... did I wake you?" Luis sounded a bit taken aback.

"No, of course not. I was just staring at the phone willing it to ring. Which is what I always do after being on an all night hunt," Dean replied, sarcasm unmistakable in his voice.

"Sorry," Luis repeated, but Dean cut in again.

"Nah, it's okay, dude. Now, what's eating you?"

Luis snorted briefly.

"What?" Dean asked, exasperation rising.

"Nothing, it's just... your choice of words, it's so... fitting." Luis was scrambling for words.

"Spill the beans, doc. What's up?"

"I think I might have a case here, Dean. Your type of case."

"Now what makes you think that?" Dean threw himself back on the bed, laying his arm across his eyes to cut out the glare of the sun shining in through the window. He could just draw the curtains but that would require him to get up.

"Well, there was this emergency this morning. Early this morning. Young man with a ripped open ribcage, like from an animal attack." Luis explained.

"Maybe it was just that," Dean replied wearily. "Maybe you got a cougar on the prowl."

"No, Dean. That's not it. The marks are inconsistent with cougar or bear attacks. And there's one more thing."

"Yes?"

"There was another victim. Same injury pattern."

"Same pattern?" Dean repeated. "Sounds like an animal attack to me."

"Yeah, well... that's what police are thinking. We're waiting for the one we saved to wake up, to give a statement. The other one...," Luis trailed off.

"What about the other one? Come on, man, don't let me pull every detail out of your nose, Luis. I'm not in the frigging mood." Dean's patience was running short. Luis sighed.

"The other one is dead."

"Dead?" Dean groaned audibly. A clicking noise from the door drew his attention as he watched Sam enter their motel room, two Styrofoam coffee mugs and a paper bag in hand. The younger brother pulled up his eyebrows in an unspoken question. Dean just waved him off as he sat up once more.

"Yes. Dead. His heart was missing."

TBC

AN2: Thanks for reading! If you liked it, leave a review so I know you did. =)