Six centuries ago, Space Marines of the Blood Angels Chapter boarded the space hulk Sin of Damnation to cleanse it of a genestealer infestation. They were never seen again. Now, Captain Raphael leads a kill team of mighty Terminators determined to avenge that long-ago shame and finally destroy the aliens. Vastly outnumbered and beset by the psychic might of the hive mind, the Blood Angels must complete their mission before they are overwhelmed by the xenos and their Chapter is humbled once again.