Agriefstrickencaptainembarksonhisfinalmissionincommandofanageingcargoship.Theshipssmallcrew,frustratedanddiscontentwiththeirlivesindeepspacetrytocompleteasuccessfulmission,buttheshiphasideasofitsown.Soon,anaccidentonboardforcesadiversiontoSomnus,aderelictasteroidstationinaforgottensectorofthesolarsystem.Theysoondiscoverthecolonyispopulatedbyamysteriousandsinistercult,hell-bentondarkplansforEarth.ThecrewshopeofsanctuaryonSomnussoonturnstoperil,astheyfightfortheirownsurvivalagainstthecolonists,andhumanitysultimatefate.TerrifyingtruthsabouttheendoflifeonEarthsoonforcethecaptaintofaceuptohispersonaltormentleadingtoaclimaticandexcitingconclusion.