The last missions of Kai’afas Cain carry him and his Valhalla regiment to the planet Adumbria, to protect it from the Chaos invasion drawing nearer. However, rivalry with the regiments of the Imperial Guard from the planet Tallarn, commanded by Cain’s old “friend” from the Schola Progenium, and the uprising of a sinister cult on the planet put an end to any hopes for an easy life.