Right so the basis for this Fanfic came from watching an incredible fanmade trailer on youtube,
And after receiving permission to fanfic her trailer... here it is :)

You can find the trailer here:
.com/watch?v=RmxlLG56r5Q

I thought I might include the trailer's plot too:
When a troubled elder goes back five years to the past and shows Prue a future where she doesn't exist. Knowing that changing the future will cause Piper and Phoebe never meeting Paige, so she goes along with her unfortunate death. Now, five years later, an elder brings her back to life; giving her a new identity and another chance at life. But what happens when Prue misses her family? The Charmed Ones are about to witness a great gift that will come to them soon! Destiny for Prue Halliwell is about to be given a second chance. This Fall, Prue Comes Home.

Feed back would be lush thank you :)
=====================================================================

Prue, Piper and Phoebe burst in to the Halliwell Manor, dragging Dr. Griffiths in tow.
"Okay, we made it. I'm sure we made it... do you think we made it?" Piper babbled quickly her eyes darting around the manor to check everything's still intact.
"I don't know," Prue spoke coldly, her confidence still hiding the fact that fear was coursing through her veins at an alarming rate.
"I think he would have attacked by now if we hadn't..." Phoebe said trying to keep spirits up, however the chirpiness in her voice now faltered.
The Charmed ones we're scared, however still ever confident that they'd pull through together, however they'd never let their innocent know such things, as he still had no idea what was going on in the first place.
"Who? Who would've attacked? Why won't you tell me what's going on?" Doctor Griffiths asked irritated, his over confidence of himself often led to feeling as if he was above others and it showed.
Phoebe turned to him, raising her hand to make her point to him. "Because we're trying to save your life"
"From who"
The doctors voice ever insistent that he be told everything grated against Prue, she hated being spoken to in a disrespectful tone of voice, however he was an innocent and their safety came first.
"Err, unfortunately we're not quite sure." She spoke, the voice that once rang with confidence now rang with a sense of unknowing, something that would always be worrying from Prue.
"That's because Phoebe," Piper poked sarcastically. "Didn't give us enough time to figure it out"
"Well, I didn't have a lot of time, I mean, I can't control how far in the future my premonitions take place," Phoebe exclaimed justifying herself. "I saw the attack. We kicked butt, what more do you want"
"Okay, I would like to know more about who we are up against?" Piper replied, resorting to a resounding sarcasm to cover her fear.
"Okay, Phoebe," Prue spoke boldly taking hold of the situation, a skill she had learnt well over the last three years especially. "Maybe you should check the Book of Shadows, see if you can find anything else on the demonic hit man"
"Excuse me?" Dr. Griffiths chirped. "Demonic"
"And how to vanquish him, that would be a good thing to know... and do not get sidetracked with the Cole potion thingy! Because the only ones we're concerned about saving right now is ourselves." Piper added as Phoebe began up the stairs.
"Err, o-o-okay. What Cole potion?" Prue said to Piper calmly.
"He told her that he only killed because some demon cast a spell on him... how naive is that"
"I thought she was over him"
"Apparently not"
"What the hell are you on about?" Dr Griffiths piped up now, the vein on his forehead now more prominent than before. "First, you tell me my life is in danger, then, you abduct me from my work, and now you're talking about demons and witches? Who the hell are you people"
Prue took a deep breathe to herself, as someone who had taken so long to accept their heritage, it had always been somewhat a personal reminder of that when someone had refused to even begin to comprehend what every day of their lives was like.
"Look, I know this all sounds incredible, but it doesn't make it all any less true, alright?" Prue closed her eyes and took another deep breath. "You're a healer right? You do good. Now either you have saved too many lives or you are about to save one they don't want you to save"
"They?" He stared back in bewilderment.
"Yeah, demons. More specifically, Shax, who is The Source's assassin." Prue replied coolly.
"Hold it." He laughed in disbelief. "This is a practical joke right"
Piper and Prue now both wore a look of bewilderment as he carried on.
"Guess you've got a hidden camera here? My second wife put you up to this? Oh, it's just like her..." He chuckled to himself; clearly the sense of humour in this situation wasn't shared by the Halliwell sisters.
"Err, okay, Dr Griffiths, listen to me, this is anything but a joke, someone is on their way to kill you and we have to try and stop them... Dr Griffiths? Piper"
Prue looked around, both of them had frozen.
"Phoebe?" Prue called out.
"'Fraid not, Prue..." Spoke a voice from behind.
Prue whirled around, bracing herself for battle, her right fist clenched ready to strike out; Before her, however, stood a strikingly beautiful woman, tall and fair with long chestnut hair that cascaded down her pristinely white robes. She stood, relaxed, her hands held together in front of her.
"Who-What are you?" Prue said boldly, her arm raised ready to use her power.
"Calm, my child, I mean you no harm"
"Oh, really"
"I am Cecilia, an Angel of Destiny."