Okay so i remember a lot from the specific fic which is why it annoys me so that i lost it :/

1) It's set after the season 8 finale and cas is still in the forest where he gets captured by other fallen angels (or demons? though i'm sure it's angels) who torture him in his human state. Meanwhile sam and dean gave up hope that cas is alive (they don't know that he got kidnapped) and team up with two other hunters. An older man and a young woman who could be tracy bell but i'm not sure. The two see a lot in black and white when it comes to hunting which is why the boys don't get along well with them.
The rest I remember is a little bit further in the story so i'm putting it in a cut



The boys + hunters hear about the fallen angels (or demons) who are causing chaos and they find the building where they are staying and fight against them. Meanwhile cas is breaking out of the building and is spotted by the older hunter and the woman who think he's one of the fallen angels and proceed to shoot him. Sam stops them in time and holds cas who collapsed while shouting for dean.



2) Also are there any fics where cas is falling and slowly loses his knowledge and abilities? So not just his memories (but that too) but also things like talking and other stuff.

Thanks in advance!
(I'm not sure if the cut is working so really sorry if it isn't)