简介：FourastronautstraveltotheMoononarescuemissiontodeterminethefateoftwoNASAcomradeswhohavenotbeenheardfrominseveraldays.TheindividualstheyfindattheLunarBasearenotwhomtheyappeartobeand,throughactsoftrickeryanddeception,nearlysucceedinkillingourheroes.Thefourreturntofindthateveryoneontheplanethasbeentransformedintoavariantlife-form.AliensfromMarshaveconqueredEarthandnowseektodestroythelastremnantsofhumanity.Theastronautsfightbackandsoondiscoverhowtoridthemselvesofthealienthreat.…