In his job as the county's spook seventeen-year-old Thomas Ward is used to battling boggarts, witches, and other creatures of the dark. But now he and his apprentice, Jenny, must team up with former rivals and enemies to fight the evil Kobalos warriors intent on destroying the county. The fight has cost the life of a strong ally, Grimalkin the witch assassin. Determined to end the war with the demons, Tom leads Jenny and Alice to Pendle for one last epic clash. Loyalties will be tested, alliances will be broken, and not everyone will survive.