Captain Froer of the Astra Militarum and his men receive a new ally in their attempts to push into enemy territory – a Space Marine of the Blood Angels Chapter. But as Brother Gammarael wages war with a monstrous foe, Froer gets a glimpse of the eternal darkness that lurks at the heart of the sons of the Angel. See the Blood Angels in battle against a truly formidable adversary, and get a glimpse into the darkness that hides behind their noble countenance.