Title: Unknown (HELP‼ :D)

Summary: Spoilers for Swan Song. My version of what should have happened in the car with Dean and Cas.

Disclaimer: Unfortunately it's not mine…if it were there would be a hell of a lot of differences

This is my first EVER fanfic so please don't flame! I appreciate constructive criticism though.

Prologue

Driving along, the radio off for a change, Dean was thinking about his brother. The baby brother he was supposed to look after. The baby brother he'd failed to protect. The most important order his dad had ever given him, 'Look after your brother', and he'd failed. He felt worthless, like there was nothing left for him in the world. There was a flutter of wings and he jumped when a rough voice whispered in his ear,

"You can stop that you know."

"Jesus Cas‼" Dean shouted, regaining control of the car after swerving. "It's called personal space dude. You're gonna give me heart attack if you don't learn it and I don't wanna go through that again!"

"I apologise Dean. I didn't mean to startle you" he looked at Dean, almost as if he were trying to see through him, "You seem to be…distracted. Your thoughts are all over the place."

Dean shot Cas an incredulous look, "You think dude? Sam's gone and there was nothing I could do to stop it. I failed Cas. Dad told me to protect him, told me I might have to kill Sammy and I couldn't even do that. How the hell do you think that makes me feel? I failed Dad but most importantly I failed Sammy. If dad were here…I don't know what he'd do but I have a pretty good idea how pissed he'd be. It was my job to protect Sammy and I failed."

As he spoke, his voice became quieter, ending in a whisper of, "I've got nothing left man. Nothing."