I'd love to talk about a sin-eater. Geist's probably my favorite splat.

For a rough background, how do you feel about a young college student who spends a lot of time on the net, looking up the creepy and paranormal, and ends up stumbling onto a forum that gets maybe a little too real for safety? She decides to investigate, see if the last poster who said they were going into the cave at the south end of <Town City> actually made it out alive, and finds herself in rather far over her head. Bargains get made, she stumbles out of the cave a couple days later, and holy shit does she have one hell of a follow-up post to write--assuming anyone will believe her.