AmericanpsychologistJohnHoldenarrivesinLondontoparticipateinasymposiumaimingtoexposewitchcraftanddevil-worshipasafraud,withattentioncenteredonacultrunbyaJulianKarswell.Debarkinghisplane,Holdenlearnsthatthesymposiumleader,HenryHarrington,hassuddenlydiedandheisnowincharge.WhatonlytheaudienceknowsisthatHarringtonwasclearlykilledbyademon,apparentlysummonedbyKarswelltoavengehispersecution.DespiteboththreateningandcajolingbehaviorbyKarswell,Holdendeterminestoproceed,thoughtheonlycultmemberwillingtotalkabouthisexperiencesisinaprisonpsychiatricward,catatonicafterallegedlykillingyetanothercultmember.However,Harrington’sniece,Joanna,believes,basedonheruncle’snotes,thatKarswellmayindeedhavesomesatanicpowersderivedfromanancienttomeinanobscurelanguagewhichhehasbeenabletotranslate,andattemptstowarntheskepticHolden.Karswell’smotheralsoattemptstowarnHoldenoff.However,thethingwhichbeginstomostgettoHoldenaretheoccasional,butmounting,sensoryandmentaldisturbanceshebeginsexperiencingafteranencounterwithKarswell,andthediscoverythat,duringthisencounter,KarswellsecretlyslippedaslipofparchmentwithacurseinrunicsymbolsonitintoHolden’sbelongings,aparchmentidenticaltooneHarringtonrecordedhavinghadpassedtohiminasimilarmannershortlybeforehisdeath...[N.B.HoldenatnopointstaysattheKarswellestate]. 爱尔兰,RedmondBarry(瑞安·奥尼尔RyanO’Neal饰)从小和母亲寄居在舅舅家,后来爱上了他的表姐Nora。Nora的父亲却想把她许配给一个英格兰将军JohnQuin。于是Barry向Quin提出决斗,决斗中Barry射中了Quin,误以为将他杀死了,匆忙逃离家乡。路上他遭遇抢劫,走投无路只能加入英国军队。在军队中他才得知,其实Quin并没有死。Barry从英军中出逃,却加入了普鲁士军。战争结束后他成了普鲁士军官Potzdorf的心腹,更让他去监视一个在普鲁士的爱尔兰间谍。Barry却和这个爱尔兰骑士惺惺相惜,爱尔兰骑士带他出入赌场,收获颇丰。Barry觉得自己应该找个有钱的女人,于是盯上了Lyndon爵士的夫人LadyLyndon。Lyndon爵士病重身亡,一年后,Barry和LadyLyndon结婚,也成了一名贵族,改名为BarryLyndon。但Lyndon爵士和LadyLyndon的儿子Bullingdon却十分不喜欢Barry,Barry也预感到自己的未来将会毁于Bullingdon手中.....