Made in the image and likeness of the Emperor, the Primarchs came to regard themselves as princes of the Universe and masters of their own destiny - they led legions of Space Marines in the glorious conquest of the Galaxy, and no enemy of the Imperium could stand against them. However, even among this legendary brotherhood, the seeds of dissent were sown, long before the greatest betrayal took place and the Warmaster Horus ignited the flames of the Heresy. This anthology collects four novellas dedicated to the powerful primarchs: Fulgrim, Lion El'Jonson, Ferrus Manus and the twins Alpharius and Omegon. And although the roles have long been handed out, they have yet to unleash a war that will forever change the face of the Imperium.