Thefilmtellsthestoryofsinglemother“Kara”(ElizabethRoberts)whomovesfromNewYorktothequietcountrysidewithhertwochildrenforajobopportunityshecan’taffordtoturndown.Thefamilymovesintotheirhumblenewguesthouse.Karabeginsherworkasaprivatenurseto“Walter,”(BruceDavison)amanstrickenwithmultiplesclerosisandanappraiserofrareantiquitieswithasecretivepast.　　Herteenageson,Jesse,(ArmanDarbo)isunhappyaboutthismostofall.Losinghisfriendsandmovingtothemiddleofnowherehasn’tmadehisjoboflookingafterhislittlesister,“Cambria,”(ChloePerrin)anyeasier.　　Doomprecedesthem.“Akiba,”(TrevaEtienne)ashadyinternationalassociateofWalter’s,bringswithhimamysteriousrelicofancientorigin.“Kara”encountersruninwithalocalsheriffplayedbygenreveteranactorDeniseCrosby.　　Alltooquicklytheydiscoverthereliccontainsmorethanjustlegends.Inside,waitsaterrifyingcreaturebornofancientdarknessandpureinstinct…apre-historiccaveSpiderunlikethemodernworldhaseverseen.