As the Emperor marshals his armies to reclaim the galaxy for the glory of mankind, one by one his Space Marine Legions are reunited with their missing primarchs.... 

Despite the Imperium's best attempts to forestall the ork plague that is wreaking havoc in human space, an ork attack moon now hangs over Terra....

Tearing itself apart from within, the Imperium is still virtually powerless to resist the ork advance....

The attempt to hunt down and kill the orks' leader has ended in catastrophe. The Imperium is reeling from the loss of so many beloved heroes....

Long considering themselves persecuted by the rest of the Imperium, the apostles of the XVIIth Legion have courted sedition, betrayal and even open heresy for decades....