Behind the bars of love (destiel Au)

What happens when Castiel a runaway, with a dark past. Meets someone from his past, Dean Winchester. When there both forced to spend the night in a jail cell together will Castiel finally tell someone the truth after 2 years? Or will he keep a running silence about his past. Witch he has tried to bury died deep down inside him. Trying to never think about it. Will he finally open up to Dean? What if Dean has more in common with Castiel then either of them thought.