简介："Mark'sPriory".thefamilyseatoftheLebanons,isahouseofterrortoIlsaCrane,secretaryandnieceofLadyLebanon.Thestrangebehavioroftwosinisterbutlers,GilderandBrooks,addsgreatlytoherfearandhersoleconsolationliesinthesympathyextendedherbyyoungLordWilliam"Willie"Lebanon.Ayoungarchitect,RichardFerraby,arrivesfromLondontoinspecttheancienthomeinregardstorenovations,andheandIslaareimmediatelyattractedtoeachother.LadyLebanontellshersonthathemustmarryIslatocarryonthefamilynamebutLordWillietellsherhehasnointentionsofmarrying.Later,thefamilyphysician,Dr.Amersham,arrivesanditisevidenthehassomeunrevealedholdoverLadyLebanon.Thechauffeur,Studd,hintsthatheknewAvershaminIndiaandthatAvershamwasdischargedfromtheIndianArmyunderunsavorycircumstances.IslaandRichardfindthechauffeurmurderedandthesuspicionfallsonthegamekeeper,Tilling,whosewifehadbeenmore...…