The season follows Sam and Dean as Dean deals with the after effects of using The First Blade and becomes a demon. The brothers try to escape the curse, dealing with a family of murderers and Cain himself.

After years of sacrificing himself for his family, it felt sort of anticlimactic when Dean died by accident on a hunt. Rather than some macho-heroic death or some world-ending mission (he'd been on plenty of those before), Dean was impaled while fighting a masked vampire.