Dark Angels are scattered across a hundred star systems. Their primarch, Leo El'Johnson, holds the post of Lord Protector of Ultramar, but few know his true motives, and a long-standing feud in the legion's homeworld could lead to a general split. Leo's ruthless actions after the Night Lords attack on the Honeycomb again put Imperium Secundus on the brink of civil war. Even the Terror Wing's most formidable fighters and knowledge of the Order's innermost secrets will not guarantee El'Johnson victory if he goes up against his loyal brothers.