Chapter 1: Angel Of The Lord

"Who are you?" Dean glared.

"Castiel."

"Yeah, I figured that much, I mean what are you?"

"I'm an Angel of the Lord." Castiel sighed.

"Get the hell out of here. There's no such thing." Dean spat towards the girl.
~
Dean couldn't believe, wouldn't believe, that his new companion was an angel.

Sam couldn't believe his brother was back from the dead. How?

Bobby isn't sure that whatever came back is really his Dean.

Things that happened are over now. So starts an era of fighting demons, alongside an angel.