ItwasadarkandfoggynightwhenMrs.Johnson，awealthywidow，realizedthathermostprizedpossession，adiamondneckcepasseddownforgenerations，wasmissing.Sheimmediatelyinformedthepoliceandtheyarrivedatherestatetoinvestigatethetheft

    DetectiveSmith，arenownedinvestigator，wasassignedtothecase.Hequestionedeveryoneinthehouse，includingthebutler，thecook，thegardener，andMrs.Johnson'stwonieces，whoweretheonlyguestsinthemansionthatnight.However，noneofthemhadanyclueaboutthemissingneckce

    Thedetectivethenturnedhisattentiontothesecurityfootagefromthenightbefore.Hecarefullyreviewedthefootageandnoticedamaskedfigurewalkingaroundthemansion.Thefootagewastooblurrytomakeoutanydetails，butitgavehimanidea

    Heinterrogatedtheniecesagainanddiscoveredthatoneofthemhadleftthehouseforacoupleofhoursduringthenight，cimingthatshehadaheadacheandneededfreshair.Thedetectivefoundthissuspiciousandstartedinvestigatingherfurther

    Ashedugdeeper，hefoundoutthatthenieceinquestion，Anna，washeavilyindebtandhadbeenborrowingmoneyfromloansharks.Thedetectiveassumedthatshemusthavestolentheneckcetopayoffherdebts

    Whenheconfrontedher，sheinitiallydeniedanyinvolvementbutterconfessed.Shehadfoundoutabouttheneckceandpnnedtherobbery.However，shehadwornamasktoavoidgettingcaughtonthesecuritycamera

    TheneckcewaseventuallyrecoveredandreturnedtoMrs.Johnson.Annawasarrestedandsenttoprisonforhercrime

    Thecasewassolved，butthedetectivecouldn'tshakeoffafeelingofunease.Whatiftherewassomeoneelseinvolvedinthetheft?Werethereanyothersecretshiddeninthatmansion?Themysteryremainedunsolved，butDetectiveSmithknewthatthetruthwouldeventuallycomeout