In the 41st millennium there is only war. The Imperium of Man has stood for 10,000 years, though its glories are long past. Laid low by the arch traitor Rogal Dorn and his fellow traitor Primarchs. You will stand as a newly appointed Chapter Master of the illustrious Ultramarines legion. Your tenure may very well be tenuous, as the machinations of heretics, xenos, and chaos grow ever bolder in this wanning age. To be a man in such times is to be one amongst untold billions. Though you are no mere man, and your story shall be written into the stars. Ending in either glorious death or triumphant victory!