Death rides the blood of a pale horse June 1893 Undead prowl the streets of Glasgow at night hunting for blood. They, in turn, are hunted by the formidable Lady Delaney and her apprentice Kerry Knox, whose fight against the secret society ruling Glasgow will lead them into the city's industrial heart where the poor toil in miserable conditions. Children have been exploited in mills and factories for decades, but the Sooty Feather Society has refined its cruel disregard in service to the undead. Delaney and Knox are not the society's only problem. The elusive demon Arakiel employs murder and necromancy in his campaign to seize control of Glasgow, avenging betrayal and reclaiming what was once his. Wilton Hunt and Tam Foley are lying low in the Highlands where Hunt's father has recently inherited title and estate. The blue skies and clear waters of Loch Aline may seem a tranquil sanctuary to the city men, but its forbidding forests and shadowed glens conceal dark secrets pertaining to Hunt's family, and a diabolical revelation will change Wilton's life forever. Demons walk the crowded, cobbled streets of Glasgow, and a necromancer's debt is called in. Knox will learn what joining this war might cost her; Hunt and Foley will learn they can't escape it. Their diverged paths will meet again when dark magic unleashes a horror not everyone will survive...