After the events leading up to Dean's death and Castiel's human reincarnation, things returned to normal for the two. Sam, however, is faced with the threat of his life when Gabriel is kidnapped by an unknown assailant, and he is left alone, bruised and battered. He sets out to find him, but he soon realizes that he might have more than he bargained for at the things he will face, the things he must do, and the secrets he finds out along the way.
So, this is the next book in the Why Are You Hiding Your Wings series! If you haven't read them yet, I suggest you check it and Bare My Soul out first!