I landed on a cold stone floor "ouch" I muttered
It was dark and I could hear voices, it sounded like Sam. I wanted to step out of the shadows and let him know I was here, wherever here was but my gut instinct told me to stay hidden.
"Ok" I heard him shout "my answer is yes Lucifer.
I tried to call out to stop him but it was too late. A few things happened all at once. Firstly Sam fell to his knees shaking as Lucifer took control of his true vessel. Secondly I realised exactly what I had to do. I needed Castiels help if the plan forming in my head was going to stand any chance of working and I closed my eyes and tried to go back, hitting blocks until I finally find an unblocked path and found myself in a cemetery.
Sam, Dean and Castiel were performing a standard salt and burn. Sam was the first to see me.
"Cait" he leapt towards me and lifted me off the ground as he spun me rounded kissing me as though he hadn't seen me in ages
"Good to see you too Sam" I laughed "How long have I been gone?"
"We haven't seen or heard from you in two months" he answered "Where have you been.
"I wish I could explain it all to you Sam ,but I have a plan and it won't be long before the angels and demons figure out what I'm doing so I have to make this a quick visit, sorry"
"It's ok" Sam said "What do you need?"
"Actually I need to speak to Castiel"
"Ok" he beckoned Castiel over while Dean finished up the salt and burn
"I'm glad to see you're OK" Castiel said to me
"I need to talk to you" I said leading him away from Sam as he I quickly told him about my plan and the part I needed him to help me with
"It's not without risks" He warned me.
"I know, I don't expect to survive but this is the only way I can save Sam. Just make sure it's not for nothing. In the future you said I couldn't change what's already happened, well in the time I'm from these things haven't happened yet so there's still a chance I can stop them.
I walked back towards Sam and Dean. Sam wrapped his arms around me as if he sensed what was about to happen "I love you" he whispered into my ear so that only I could hear.
"Hey Caitlyn" Dean actually looked pleased to see me "Are you back with his? No more been pulled away?"
"Looks like it" I replied
It was quarter to midnight when I snuck out of bed, been careful not to wake Sam as I crept out of the motel room to meet Castiel back in the cemetery.
"You're cutting it close" he commented as I arrived with less than five minutes to spare.
"Did you get everything? I nodded towards all the ingredients he had set out, half of them I didn't recognise.
"Yes" I tried to hide my uncertainty. I knew this was the only way.
"Then I'll get started" he began chanting.
"What do you mean by calling me here?" Lucifer demanded as he appeared in front of us. The temporary vessel he was using looked worse for wear.
"Your vessel appears to be fading fast" Castiel noted
"What business is it of yours" Lucifer snapped.
"I thought about what you said" Castiel said "and I want to join your side.
"How can I trust you?"
"I bought you another vessel" Castiel nodded towards me
"Sam Winchester is my true vessel" Lucifer protested with distrust in his eyes.
"True" Castiel admitted "But he hasn't said yes and I fear your vessel may not hold out that long"
Lucifer looked me up and down "So you want to be my vessel until Sam says yes"
"Yes" I nodded
He sniffed the air "is that witch I smell?" he asked "I suppose you might make a useful vessel" he considered the options.
"Ok" he decided "do you invite me in?"
"Yes I invite you in" I said as I saw Sam and Dean sprinting towards us in the distance.
The vessel Lucifer had been using fell to floor, now just an empty meat suit.
I screamed out in pain as I felt Lucifer inhabit by body. The blackness and pure evil tried to consume me and I saw Sam standing in front of me with pain his eyes. I knew how he felt.