Disclaimer: Sadly, I do not own Supernatural, or anything to do with Supernatural. I do however, own Mary Winchester jr. Supernatural belongs to Eric Kripke, Warner Brothers and the CW (and anyone else I might have left out). Not making anything from this. This is just for fun.

A/N: Just a new story that's been floating around in my head for a while. Even though I just started this story (and have two more chapters to it), I'm going to put this on hold, as I'm writing out a huge Supernatural story right now, which will eventually lead to five stories altogether. It's a huge project and will be taking up most of my time. Sorry for any inconvenience.

Changing Fate.

Prologue: 2040 A.D

"Run, Mary! Get out of here!" Running through the thick trees, I stumble over a protruding tree root, and fall flat on my face. My father stops running, and picks me up, trailing me behind him.

"Sammy? Get Mary out of here!" My Uncle Sam takes me from my father and drags me onwards; the black smoke behind us getting closer. The demons want to kill my father, uncle and me, the last of the Winchesters.

I trip again, and my hand slips from my uncle's momentarily. I can't hear anything, except the odd snapping of a twig here and there. I jump a mile when I hear heavy footsteps coming towards me.

"Mary?" I recognise the voice of Uncle Sam. I rush towards him, and just as I'm five feet away from him, a branch, the thickness of my wrist, and about five foot long, covered in blood, protrudes out of Uncle Sam's chest, right through his heart. I scream and my uncle falls to his knees to his knees, blood pouring out of his mouth.

"Run!" He gasps, before falling over, dead. I scream again and run when I hear the voices of the demons that have killed my uncle.

I lean against a tree, panting after what seems like an eternity of running. I don't hear anything, no noise whatsoever, no birds, not even the rustling of leaves from deer walking through the forest.

Starting to jog on again, I trip and fall headlong onto the leaf strewn ground. Sitting up, I see what I have tripped over; my father is lying on his back, with his neck bent at an impossible angle. His green eyes – eyes that will never see again – are wide open and staring.

I scream again and crawl over to my father, Dean Winchester. Closing his eyes, I hear the demons coming for me.

"Come out little Winchester!" One sneers, and then giggles.

"You can't hide forever!" Another one yells.

I get up and start to run again, only this time I bump into someone. I try to run away, but the person I bumped into has grabbed a hold of my arm.

"Lemme go you son of a bitch!" Struggling with all my might to free myself, but to no avail.

"Mary!" Upon hearing my name spoken with urgency, I turn around and meet a pair of astonishingly blue eyes.

"Castiel?" Relief washes over me, and I grab the angel and sob into his tan trench coat.

"You must come with me Mary, you need to set things right." I look up into Castiel's eyes, but before I can say anything, he puts his hand to my forehead, and everything goes dark.

When I wake up, I am no longer in the forest, and the sky outside, which is normally blood red during the day, is pale blue, with the sun shining overhead. Birds twitter and children laugh.

Sitting up, I realise that I'm on a park bench, and children are running around laughing, and screaming with excitement in the park just ahead of me.

"What the hell?" I mutter to myself. I try to take in my surroundings and see a diner across the road, which has cars in it! Real cars, that are moving, and are different colours, not burnt out and in the middle of a fiery street, with skeletons inside.

I get up, cross the road, and call into the diner. The patrons all look up when I walk through the door, which tinkles, then they go back to what they were doing. Walking towards the counter, I sit beside a tall man with spiky dark hair, who has his back to me, talking to another even taller man who has his face hidden in his laptop.

"What can I get for ya honey?" A nice, middle aged woman asks me, she's holding a jug of coffee in her hand. "Would ya like some coffee?"

"Um, sure. Thanks." The woman reaches behind the counter and hands me a cup which she fills with coffee. I take a grateful sip, and let the hot brown liquid wash around my mouth and down my throat. As I sit there sipping my coffee, I overhear what the two men are talking about.

"...don't know why you dragged me here of all places, Sammy!" My eyes begin to tear up, one of those two guys is called Sammy, and it reminds me of my Uncle.

"You know why Dean! We have to destroy that ghost before it kills anyone else!" I choke on my coffee at these words, which makes the guy beside me turn around and look at me. He smiles in a very seductive way, but I'm stunned as I stare back into green eyes identical to my own.

Dad?