It has to be one of these two. My guess is the second one though.
Girl with Stars by Anaunthe
Summary: All Human. Sparks fly when Buffy Summers meets successful business man Spike Thorndale. Unfortunately, Spike is a suspected art thief, and it's Buffy's job to collect evidence against him. Already emotionally involved, things get worse when Buffy's evidence is used to implicate Spike in connection with three brutal murders – one in China, one in Romania, and the last in New York.
Crystal by Vanilla
Summary: All-Human AU. A beautiful blonde is undercover for the FBI in Los Angeles. She is working as a computer hacker for one of the country's richest, dirtiest, and most handsome businessmen, who just happens to have a few secrets of his own. Sparks fly, because don't they always? |