HALO (Castiel Love Story)

AU! 13x22; With the threat of the apocalypse and its ruler, Michael, coming to their world. And with Mary and Jack nowhere to be found. Alex Winchester and her brothers do everything In their power to prevent a apocalypse in they're world. But their plan takes a dangerous turn, when Alex is the only one who goes through the rift. And is captured and imprisoned by another version of Castiel