The Dark Angels are scattered across hundreds of star systems. Their primarch, Lion El'Jonson, holds the post of Lord Protector of Ultramar, but his true motives are known to few, and long-standing enmity on the Legion's homeworld threatens to lead to a general schism. The Lion's ruthless actions following the Night Lords' attack on Sotha once again bring Imperium Secundus to the brink of civil war. Even the most formidable fighters of the Dreadwing and knowledge of the innermost secrets of the Order do not guarantee El'Jonson victory if he opposes his loyal brothers.