 It is presented from the point of view of Kasper Hawser, formerly a noted Terran academic who becomes a Crusade Remembrancer, and then the Oral Historian or of the 3rd Company of the Space Wolves Legion.On the surface it is his story; the important understory concerns the long-term machinations of Chaos, whose aim is the destruction of both Space Wolves and Thousand Sons.Chaos attempts to exploit the weaknesses of the Primarchs and their Legions in order to pit them against each other the ultimate result is the confrontation on Prospero.