The Grey Knights are a myth, a secret Chapter of Space Marines that responds to the greatest of threats: daemonic incursions into the Emperor's realm! They are spoken of in legends, armoured heroes clad in silver, whose weapons blaze with holy fire and whose merest touch can destroy the servants of the Ruinous Powers. And the legends are true. In this collection of stories, a squad of Grey Knights, commanded by Justicar Styre, battle the infernal followers of the Plague God across the Imperium!