As Inquisitor Damietta of the Ordo Malleus interrogates the survivor of a doomed attack on the daemon world of Voidsoul, she realises that a deeper mystery lies behind the events that occurred there. Defying her master’s commands, she delves into Sergeant Morbach’s account and discovers a shocking secret about the nature of the Space Wolves Chapter of the Space Marines, a secret that will change Damietta forever.