From the Fiery Lake

Sam and Dean finally kill Michael only to be faced with a new problem. The nothing is angry, it can't sleep since Castiel was brought back to life and it's pissing him off. So he's sending back all kinds of problems for them. The men of letters is falling apart. Hunters are dying left and right and Sam and Dean are reunited with some old friends , Crowley , Bobby ( from their world) John , Amara ,God, Death, and some old enemies Lucifer and leviathans and there are more surprises to come so they decide to recruit a Demon named Marcus to help them find their only hope , the only person or rather entity that has loved the Human race no matter what they did to her Mother Earth. Will they find her andif they do will she even be able to help them despite her best efforts