There was story posted back in the spring or summer on EF where Buffy was stuck in an alternate dimension and ends up losing her slayer power and becoming a prostitute in a demon brothel. While there, she also becomes addicted to drug that available only in that realm. I'm not sure if she and Spike went to the dimension together and got separated or if he went in search of her, but he finds her and gets her back on the straight and narrow. It was a great story, but I can't remember the author's name. It wasn't someone who regularly posts, in fact, I think it might be the only story they ever posted. I hope this is helpful. I tried searching, but had no luck. Could be because I have a terrific migraine. Sorry
