I knew what author it was by and they did take it down but after lots of googling I found it.
http://goldenusagi.livejournal.com/33270.html#cutid1Descent by GoldenUsagi
Rating: R
Warnings: Implied rape
Word Count: 400
Summary: Alternate reality, human Buffy. Buffy is abducted and held by Angelus. She hopes Spike might be the lesser of two evils, but if he is, it's not by much. Spike finds Angelus's new plaything tied up in the bathroom, and she pleads to be set free... Complete
This story really isn't what I would call Spuffy. Spike is evil and doesn't really even help her. So this isn't Spike saving her from Angelus. I just thought I would warn you.