Author's note: This story is separate from my other fics. I decided to do something different for a change and being a fan of AU fics I thought I would try one. I've had this idea in my head for a while and I decided to get it out before someone else beat me to it lol. Hope you guys like this and I promise it will get better as it goes on.

WARNING: This will be a dark fic, with scenes of violence, swearing and fem slash, so if you don't like don't read :-) Just thought I should warn you.

Disclaimer: I don't own the characters of Buffy and Faith, they belong to Joss, I just decided to borrow them for a while.

Fighting your Demons

Chapter 1 - Beginnings

Buffy cursed for the hundredth time as her car stubbornly refused to start, what with the snow outside and the fact that her car was a piece of shit, it was no wonder it had died on her. Once again she wondered why she had accepted the transfer to New York. After all she'd been happy working at the police department in Los Angeles, that was where her friends where, that was where the sun was, and that was where she wanted to be at this very moment in time.

Groaning in frustration she slammed her hand against the steering wheel, before slumping back in her seat. She risked a quick glance at her watch, hoping that by some miracle time was moving backwards, but nope she was still late for work, again. "Just fucking great!" she cursed. She knew her partner would tease her mercilessly for this, as he had done the last three hundred times she'd been late.

Cursing her car, the snow and the world in general she grabbed her bag and climbed out of the car. Clutching her coat tight around her she slammed her car door behind her, not bothering to lock it, after all it wasn't as if any carjackers would be able to go anywhere in the heap of crap. Casting one last glare at her car she trudged off down the street praying that someone up there loved her enough to send a cab her way.

Meanwhile 12th Avenue - Apartment 210

The young man screamed in agony as the blade embedded in his thigh was giving a vicious twist, he strained desperately against the ropes binding him to the chair but no matter how much he fought he couldn't loosen them. The brunette kneeling in front of him watched impassively as his blood began to pool on the hardwood floor at his feet.

"I ain't gonna ask you again Ricardo, where's the money?" she asked, her dark gaze drifting up to study his sweat soaked face intently.

Ricardo gasped and forced his eyes open, staring at the young woman in front of him. "I told you, I don't have the money." he gasped, his eyes widening in agony as the woman grabbed the dagger and leaned all of her weight on it as she moved in closer to him.

"You know there's two things I can't stand, men that lie, and men that fuck over my family." she whispered, her lips mere inches from his ear. "Now if you're a good little boy I'll make sure you can have an open casket funeral." she said, "If not well lets just say the coroner will need more than dental records to identify your body, and you'll be alive long enough to experience every second."

"O-Okay, the money's under the floorboards in t-the spare room." he stammered.

"What about your stash?" she asked leaning back to look in his eyes.

"I-It's in there as well." he said.

The woman turned to the man behind her, "Ritchie?"

"I'm on it." he said, before he turned and left the room. The woman turned her attention full attention back to Ricardo.

"Okay, I've got one last question for ya, and then we'll leave you in peace." she said. "Who paid you to screw us over?" she asked.

Ricardo gulped, "I-It was the O'Rielly's." he stammered. "They paid me to pedal some new stuff t-they got shipped in f-from Columbia. I needed the money I wouldn't have done it otherwise."

The woman turned round as Ritchie re-entered the room with a large black holdall. "He was tellin the truth." he said.

"Well Ricardo, looks like we've got what we came for." she said grinning she stood in front of him and removed the gun from the waistband of her jeans. "Thanks for your cooperation." she said raising the gun she aimed it at his forehead.

"No please wai-" His words where cut off by the sound of the gunshot reverberating round the small apartment, followed by his body falling forward in the chair. The woman sighed and turned to the man beside her. "Well that was fun, you wanna get a coffee?" she asked, causing the man to laugh.

"Hell Faith, we'll have to clean up first." he said, gesturing at his sisters blood splattered clothes. "Not to mention the fact we've got a bag full of blow and at least twenty thousand dollars in cash. We might as well hang a sign round our necks sayin arrest me."

Faith sighed, "Well if you're gonna be a baby about it I suppose we could drop this stuff of at Johnny's first. Give us a chance to clean up and catch up. Besides I suppose we better tell him that the O'Rielly's are back in town." she said grimly, tucking her gun in her back pocket.

"Shit that ain't gonna go down too well." he commented.

Faith looked at him incredulously, as she pulled on her leather jacket, silently thankful that she'd chosen to wear her black jeans and not her leather trousers. "Ya think! Man he's gonna go apeshit. We've had enough trouble trying to keep a hold of our dealers without having the O'Rielly's as competition. Fuck I'm glad you're the one that's breaking the news to him and not me." she exclaimed.

"What! Hell no you're tellin him!" He exclaimed.

"Nuh uh." Faith said shaking her head vehemently.

"Uh huh, you're the one that got the info out of old Ricardo over there." Ritchie said.

"Okay fine, I'll race you downstairs to the car. Whoever loses has to break the bad news to Johnny and buy the coffees for the rest of the guys." she said, raising a challenging eyebrow in his direction.

Ritchie looked at her thoughtfully. "Okay sounds fair to me." he said.

Faith grinned and opened the door to the apartment. "Alright, on the count of three……THREE!" she yelled sprinting out of the apartment and down the stairs before Ritchie even knew what had happened.

"What the fuck! You know cheating ain't fair!" he exclaimed, he made sure he closed the door to the apartment behind him before he ran after his sister.

New York Police Department

The yellow cab screamed to a stop outside of the NYPD precinct. Buffy threw a handful of cash at the driver before throwing the door open. "Hey lady you've gave me too much here." the driver exclaimed.

Buffy looked back at him, not slowing her pace as she ran up the steps, "Doesn't matter just keep the change." she yelled before she headed inside the building. The driver shrugged and pocketed the twenty dollars change before pulling away.

Buffy arrived at the chiefs office and quickly peaked in the window, she saw that her partner was already there and that the briefing had started. Which was really no surprise. Opening the door she attempted to sneak in unnoticed which was hard to do in a small office full of four people.

"Summers nice of you to show." Chief Marsden commented looking up at the clock on the wall. "Only half an hour late today well done."

Buffy blushed and made for a chair at the back of the room. "Sorry chief." she mumbled, ignoring the smirk on her partners face as she grabbed the seat next to him.

"Anyway as I was sayin Ricardo D'Tora is a well known drug dealer, he normally operates from an apartment down on 12th avenue." he explained, pointing to a picture of a clean shaven young man. "For all intents and purposes he looks like the guy next door. Don't let this fool ya, he's likely to be armed and should be approached with caution. As you know we've been tailing this guy for months, and we know that he's been fraternising with members of the Lehane family. The problem is he's been getting antsy and he's beginning to know that something's up, we need to bring him in now before he can run and hide behind his gangland friends. Summers and Finn, you two are going to go pay this guy a visit at his apartment, while Anderson and Carmichael go to his work just encase the little runt decided to show up. If there's any trouble don't hesitate to radio for back up." he said. "Does anyone have any questions?" he asked looking at the small group before him, his gaze coming to rest on Buffy.

"No sir." They all replied, before getting up and leaving the office.

Buffy had nearly made it out the door, when she hard the chief calling to her, "Summers, you better not be late again you hear me." he said.

"Yes sir." she said, smiling apologetically. She left the office and turned to see her partner grinning knowingly at her. "Don't start Riley, I've had to walk four blocks in the freezing snow because my car died on me and I swear to God if you say anything to piss me off I'll shoot you." Buffy snapped.

Riley held up his hands in self defence and smiled at his partner, "Whoa, no need for violence, I would never do anything to piss you off you know me." he said grinning at the scowl that fell across his partners face. He threw a friendly arm around her shoulder and led her down the stairs towards the main doors to the precinct. "Listen how about you take your aggression out on this drug pusher, and then I'll take you out for a coffee to warm you up. Deal?" he asked.

Buffy grudgingly agreed. "Deal, but you better make it a double latte." she mumbled, allowing him to lead her to their waiting car.

TBC.

A/N: Please be honest and let me know what you think, if you guys liked it I'll carry on writing.