I promise you

When the angel Castiel loses the one thing he has ever cherished he changes, he no longer cares about the well being of others. Hell bent on getting back what was stolen from him, he meets the Winchester boys who are fighting the apocalypse, and their sister. Who isn't what she appears to be at all.

( This was a bad description I'm sorry.. I follow the SPN story line to a point. Season4 and on spoilers.) Disclaimer: All rights go to the creators of Supernatural, excluding scenes I alter as well as my own characters.
WARNING: Contains light smut, cussing (When I feel it fits the scene)