Having thwarted the invasion of the ferocious Blood Demons and protected the Baal homeworld from disaster, the Blood Angels set out to find the one who almost destroyed them - the renegade Fabius Bile. Tracking a Chaos traitor to his secret base on Dainik 5, a world under siege by the Tyranids, the Blood Angels encounter horror beyond their imagination. And having taken possession of the vial with the blood of the primarch, the Angels will have to find out what vile plan Bile is hatching.