Specfic fic- hurt!cas rescued by Dean

[mizzsy.livejournal.com]

I think it's a prompt from one of the memes but Dean goes to kill Dick Roman for revenge on Bobby but overhears some leviathans and finds Castiel being kept prisoner in the basement. I remember Cas wouldn't go with him at first because the leviathan had been taking on Dean's form and pretending to rescue him before. There was also a point near the end when Cas tries to leave Dean on a bus because he thinks he's useless or Dean hates him or something. I think non-con and destiel were also implied in it.

If you can find this fic from my ramblings I will love you forever because its driving me insane!