Sam unknowingly sacrificed himself while finishing the trials after failing to find God. Dean is left a mess on the inside, but is forced to bottle it as he focuses on the bigger problem. Instead of sealing all of the demons inside Hell, it expelled them, all of them, including Lucifer. More so than ever, the search for God intensifies. What will happen when angels and demons all roam the Earth together?

The angels have fallen. Castiel lost his grace, and is now a human. He experiences hunger, cold, need, but still pondered at the thought of love. Dean takes him under his wing and helps him understand his new way of life; every aspect. Even though his grace is lost, the affair between a man and an angel is forbidden. Not to mention, an angel and a Winchester. In addition to the internal conflicts between the two, they also have to worry about the bounty put on Castiel's head by the other fallen angels.