In space no one can hear you scream. Not that the Space Marines scream, you understand. Genetically engineered and unquestionably loyal to the Emperor of the Warhammer 40K universe, these fighting machines fight and die with zeal and fervor – no regrets, no remorse type of an affair. A small squad of these heavily armoured warriors armed with chainswords, flamethrowers and psionic powers is deployed to a Space Hulk – a remnant of a ship floating through space. Heavy infestation of alien zerg-like Genestealers is reported.