Demons, Lies, and Angels

Dean's suddenly back from Hell and the world isn't the same as when he left it. Angela and Sam have split up and she's pissed at Sam, but neither of them will spill the beans to Dean. What happens when Dean is told? Will Sam and Angela get back together? What's Ruby's part in all of this, and most importantly, who's this Castiel? Find out in DLaA! Revision of season 4. Mild Sam/OC