Novel focused on Lysander, peerless captain of the Imperial Fists Space Marines and wielder of the Fist of Dorn Captain Darnath Lysander, hero of the Imperial Fists and captain of their elite First Company, leads his brothers in an assault on a daemon world. Beset by unimaginable horrors and tortured by memories of his time imprisoned by the dark forces of the Iron Warriors Legion, Lysander must rally his Space Marines to defeat the master of the daemonic hordes before they are all consumed - or corrupted - by the insidious powers of Chaos.