简介：TheintendedweddingofCaptainHugh"Bulldog"DrummondtoPhyllisClaveringathervillainSwitzerlandisstoppedshort(onceagain)whensomeonemurderstheSwisspolicemanwhoisguardingtheirweddingpresents.Thekillermakesoffwiththeirprizepossession,asyntheticdiamond,madebyasecretprocessbyProfessorBernardGoodman,thefatheroftheirgoodfriendGwenLongworth.Aguest,SirRaymondBlantyre,headoftheMetropolitanDiamondSyndicate,disappearsatthesametime,andDrummondsuspectsthatSirRaymond,whohasthemosttoloseifProfessorGoodmanproceedswithhisplanstopublishhissecretprocess,hassomethingtodowiththetheft.HeleavesPhyllisandchasesbacktoEngland.ColonelNielsen,ofScotlandYard,asusualscoffsatDrummond'ssuspicionsandinsiststhatamanasrespectedasSirRaymondcouldnotpossiblybeinvolvedinsuchacrime.But,asusual,hehasDrummondfollowedjustintheeventheturnsupsomethingunexpected.AnexplosionthatwrecksGoodman'shouse,andapparentlykillshim,makesDrummondmorepositivethatthediamondkinghasagainresortedtomurdertoprotecthisbusiness.HefollowsProfessorBotulian,alife-longrivalofGoodman's,whomhebelievestobeinvolvedintheaffair.HishuntleadshimtoalonelyhouseontheoutskirtsofLondonwherehefindsGoodmanaprisoner.Beforetheycanescape,DrummondandGoodmanarejoinedbyTenny(E.E.Clive),hisvalet,andPhyllis,whoarealso(asusual)beingheldbythecrooks.FacedbyBlantyneandhisarmedconfederates,Drummondbeginstofighthiswayout,butismetbysuperiorforces.…