Skinner, Pearl, Book, and the rest of the team are finally united in their mission to stop the Beast from world domination, but the missing key to their success is protected by a council of preeminent ancestral monsters with an axe to grind. These are the progenitors of some of the world's most iconic folkloric species, and the victims of a broken American promise. Desperate for the council's assistance, Skinner's crew becomes a captive audience to their tale of betrayal-but the chilling insight saps all hope of recruiting their help. With only a few days to spare before terror is unleashed, the team must convince the legends that humanity is worth preserving, and that history may still bend toward redemption.