Set during the Supernatural episodes "I Know What You Did Last Summer" and "Heaven and Hell."
What if Anna Milton was one Buffy Summers.
Dealing with her own fall from grace.
Doesn't have to stick strictly to the entire storyline, the episodes could just be the basis. Especially since I don't see how the exact storyline would fit, but is something that I would like to see, considering the connection Buffy would share with Dean just like Anna had.