Hi! 
I've been going crazy trying to remember the title of a fic, which wasn't complete when I last read it: I remember that in the first chapters Castiel visits the boys (who are together, and Castiel knows) and tell them about a case they have to deal with, which is somewhere Sam doesn't want to go to because he was somehow abused by his coach in high school (I believe the coach's name was Snyder or something like that, and in the fic it was a friend of john's) - Dean doesn't know this, he just notices that his brother is behaving strangely...Ring any bells? :)
Thanks so much for the help!