1) Follows the storyline of Wings of Desire, where Castiel and Anna are the angels on Earth and Castiel becomes fascinated by Dean. Dean is helping support Sam through law school and I believe is working as a mechanic. Castiel keeps visiting Dean in his home and touches his arm to soothe away the stress. FOUND!
2) Castiel goes into Hell and saves Dean, but Dean is so damaged that Castiel has to take Dean to purgatory to repair him and because no demon can come into purgatory and drag Dean back to Hell. Dean's so damaged that he doesn't even resemble a person but some sort of beast and he has to be chained up so he doesn't attack Castiel. Dean doesn't remember anything from his life, but as he becomes human again he starts remembering things. He remembers the song Wanted Dead or Alive. I think the story stayed pre-slash but I don't really remember. in the end Dean doesn't remember anything from purgatory when he comes back to life. FOUND!