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.

影片剧本由亚历杭德罗·冈萨雷斯·伊纳里图与长期合作伙伴尼古拉斯·迦科波恩联合撰写，故事主角是一位著名的墨西哥记者、纪录片制片人，多年之后，他回到祖国，试着真正面对他的身份、家庭关系、愚蠢的个人回忆，以及墨西哥的过往和现状。