Worlds Colliding (Supernatural) Book Nine

Sam Winchester is possessed by an Angel.
Dean Winchester and Ness Singer-Winchester are in on the loop.
Sam and Dean's sister, Catty, is not.
Dean knows that Sam will be angry with him for a while. And he's worried to no end about his wife, Ness.
Catty has the reason that she and Sabrina have been on the run for nearly two years, Crowley. She will try to torture her way to her and her daughter's freedom and other things the gang need. And Abaddon is targeting Catty to use her as a vessel as leverage over Sabrina to get what she wants from her to become the Queen of Hell.
Castiel is human. When his and Catty's daughter, Sabrina, is victim of the fall, he takes Sabrina away long enough for her to heal herself and get back into the game. But Sabrina's wings had been burned off, and it will be a slow, long healing process.
Octavia is back from the dead and having to deal with the fallen Angels looking toward her as a leader.
And Ness will take on the Mark of Cain. She's the one for control. She's the one that always has an answer or always comes to the rescue, and now she needs to be the one rescued.
Can they all move past their individual challenges to defeat Abaddon and Metatron?
And what or who will they lose in the process?