简介：HerculePoirotisboredtotearsandwiththreeweekssincehislastcase,isworriedthathislittlegraycellswillstopworking.CaptainHastingssuggestaeveningatthetheatertoseethelatestmurdermysterybuteventhatdoesn'thelpwhenPoirotfindstheplottobeabsurd.OntheirreturnhometoWhitehavenMansions,theylearnthatthenewoccupantoftheflattwofloorsbelowPoirot'shasbeenfoundshot.Shehadonlymovedinthatverysamedayandwasanunknown.PoirotputshislittlegraycellstogooduseandassistsInspectorJappofScotlandYardinidentifyingthemurderer.…