Marneus Calgar, Chapter Master of the Ultramarines, is not only a consummate warrior, but also a highly talented strategist. He is master of Ultramar, a vast swathe of space on the embattled Eastern Fringe. He launched the counter-invasion of the xenos-tainted planet of Vigilus with the veteran warriors Lethro Ados and Nemus Adranus – two of his most trusted aides from the Victrix Guard – always at his side.