Sister Augusta of the Order of the Bloody Rose returns to the pages of Black Library in The Rose in Darkness by Danie Ware, author of many fantastic Adepta Sororitas stories. Augusta has been sent to retrieve an important relic from the shrine world of Opal, only to find the planet in the throes of its most holy celebration.

Despite the seeming piety of the world, dark political machinations wait just below the surface, and the Bloody Rose will soon have its work cut out eliminating a many-armed, many-clawed cult rising from the depths.