Agriefstrickencaptainembarksonhisfinalmissionincommandofanageingcargoship.Theship'ssmallcrew,frustratedanddiscontentwiththeirlivesindeepspacetrytocompleteasuccessfulmission,buttheshiphasideasofit'sown.Soon,an'accident'onboardforcesadiversiontoSomnus,aderelictasteroidstationinaforgottensectorofthesolarsystem.Theysoondiscoverthecolonyispopulatedbyamysteriousandsinistercult,hell-bentondarkplansforEarth.Thecrew'shopeofsanctuaryonSomnussoonturnstoperil,astheyfightfortheirownsurvivalagainstthecolonists,andhumanity'sultimatefate.TerrifyingtruthsabouttheendoflifeonEarthsoonforcethecaptaintofaceuptohispersonaltormentleadingtoaclimaticandexcitingconclusion.