The Impala's wheels crunched the tarmac as Dean and Sam Winchester pulled up to the local morgue in Old Town, Wichita. Suits washed and on, they walked to the boot of the car in unison and starting shifting through their collection of fake official I.D's.

"So male in his late twenties found decapitated in the woods, what makes this so special?" Sam asked, securing his badge and fake business cards within his jacket pocket.

"Bobby pulled up some intel and apparently they believe the dudes head was ripped off his body by force." Dean replied, fastening his favourite gun into his waist holster.

"Wow, must have been one hell of a party."

"You're telling me. Come on, let's check this poor bastard out." Slamming the boot shut, the two brothers went into their standard FBI mode. After some flirting with the secretly a la Dean, and some acting skills from Sam, they stood alone in front of the draw holding the body of their supposed victim.

As the pressure lock was opened, Sam and Dean glanced at each other, always knowing to expect anything. As the body came sliding out on his tray, head placed in a separate bag above its shoulders, the boys got to work.

After examining the neck wound, Sam rolled the head from its bag, murmuring a quiet "gross." Using a pen from the side desk, he slowly pried the victims mouth open, first inspecting the tongue, then the gums.

"Hey Dean, I don't think we have a normal victim on our hands here." Slowly Sam applied pressure to the upper gum and two fangs slid out of the unusual, almost invisible holes. "Think it was a hunter?"

"A hunter that rips off vamps heads like this? Doubt it, I don't think it's even humanly possibly to use such force."

"It's not." Came the chilling, monotonous voice of Castiel, causing both brothers to jump and spin around to the corner of the room where he stood in all his glory.

"Damnit Cas! What have I told you about sneaking in like that! Around dead bodies too! Fuck!" Dean all but shouted, placing the scalpel on the tray and removing his gloves, stepping away from the body.

"Wait, what do you mean? This wasn't done by a human?" Sam asked, removing his own gloves and standing by Dean in the middle of the room. Castiel slowly moved closer to the body, head tilted in fascination.

"No, this isn't possible for a human. This vampire comes from very far back, ancient almost. A human could never possibly kill it with such ease." Castiel jabbed at the head slightly, watching with curious eyes as it rolled back and forth.

"Ok… So wait, we don't see you for what? 2 months? Then all of a sudden you turn up out of nowhere for some old vamp case? What's the deal, Cas?" Dean huffed as he placed his hands in his pockets. They'd tried contacting numerous times to find out what was going on in Heaven after Cas constantly ranting about some civil war whenever he was about, but he never replied. Why show up now?

"I need to ask a favour of you both, and I believe this case is connected to it."

"What? You can't reply to us for months then start asking for favours?"

"I'm aware I haven't been here much, but the war is still raging in Heaven and I must partake in it to keep order. That's why I'm here now; I believe this particular case you're on is in direct contact with someone I need you to find."

"So now we're on some wild goose chase for some unknown person? Brilliant!"?

"Dean, wait, let him explain. Is the person we're looking for the one who did this?" Sam placed his hand on Dean's shoulder to calm him down, he knew he'd almost felt betrayed by his angelic friend every time he refused to reply to their calls. Dean huffed again in acceptance.

"I believe so, yes. Her name is Serenity, and she isn't like any kind of creature you've encountered before. She's a rare, almost extinct species that is governed neither by Heaven or Hell; but she does have the power to stop the war in Heaven."

"So if this weird thing can stop the war, why hasn't she?" Dean asked as he approached the body again, sliding it back into its allotted slot and closing the door.

"Because no one can ask. Her species is called Star Singers; she's the last of the kind. They basically possess power that angels deem blasphemous and demons are terrified of; the powers of the Gods."

"Then why are you asking her to stop the war if she's 'blasphemous'?"

"Times have changed, I no longer perceive humans as the same hairless apes I once did, so I must accept that Star Singers have the ability to help us."

"Brilliant. Where are we suppose to even find this chick anyway? Where do we start looking? We don't even know what she looks like!"

"Here" Castiel pulled out a plain brown folder and opened it to reveal files. "I've been tracking her movements, but I can't approach her. She isn't exactly… Friendly towards Gods workers."

"Why not?" Leaning against the table placed in the centre of the room, Sam began flicking through the files.

"Both Heaven and Hell fear her and her power, so shamefully, exiled her and attempted to destroy her."

"So you both hate some chick because she's crazy powerful so you decide to kill her? Surely you must have known that wouldn't work."

"Yes, but like I said, we were afraid, we didn't know what to do and our father wasn't present to guide us, we did what we thought best."

"Yeah, and got your ass kicked." Dean snatched the files from Sam and started roughly flicking through the pages. "There's no description or pictures, how are we suppose to know her when we see her?"

Castiel reached into his inside jacket pocket and pulled out a photograph. In it was a young woman, probably in her early to mid twenties, wearing leather trousers and a black tank top, arm placed on her hip as she stared down at the camera with a smirk on her face. She had an array of tattoos lacing her arms and her hair was a fiery red colour, eyes almost white but on second glance, could be seen as an icy blue.

"Woah, babe." Dean muttered as he took in the picture. The way she held herself he could tell she was powerful. 'Well this will be difficult' Dean thought. Snatching the picture off of him, Sam took a quick glance and placed it into the files he retrieved back from Dean, closing them.

"So when we find her, what do you want us to do? Gank her?" Sam asked, tapping the files together on the desk and slipping them under his arm.

"No, befriend her, ask for her help. She has a soft spot for humans so she'll probably trust you."

"Probably?"

"Like I said, befriend her."

Sam and Dean mulled it over in their heads, glancing at each other and raising their eyebrows sceptically. Was this a good idea? Did they even have a choice?

"So hey, why is she called a Star Singer anyway?"

And just like that, Castiel was gone.

"Damnit Cas!"