Castiel, an angel of the lord, has a mission. He needs to get into Hell. The fate of the world is depending on him. Dean Winchester is in the pit, it is up to Castiel to save him before a demon, Alistair, takes him as an apprentice and breaks the first seal to release Lucifer. He seeks the help of a cross roads demon, Crowley, that has his sights set on the black throne when the apocalypse starts. He must fight demons in home territory, and save Michael's vessel, all without coming face to face with Satan himself.
The Winchesters have successfully retrieved their father and sister back, but their sister is different and they all know it. Faith learns to control her powers while evil stirs. Lilith is coming and she wants Sam dead. What will Dean and Faith be willing to do to save those they love?