In the abyss of vast space, a space station is drifting - a fortress - a monastery of the Brotherhood of Fists of the Space Marines. Paratroopers with superhuman qualities serve one purpose - to protect the gigantic human Empire from external and internal enemies. To defeat the nightmarish creatures invading our Universe from warp space, physical strength and cutting-edge weapons are not enough - the paratrooper must not doubt the justice of his mission. Believe or die is the only law of cosmic brotherhood.