When a run of the mill hunt backfires, Castiel finds himself challenged with something terrifying that he's never had to face before. But will a hidden secret be the catalyst to destroying their family for good? or will he find out his true value to the Winchesters, before it's too late. (Set sometime in the future) hurt/comfort, family, angst, NO Slash. Contains spoilers for 11X10
5 parts