GeorgeHarveyBoneisacomposerinearly20thcenturyLondon,whoisunderstressbecauseheiswritingapianoconcertoDuetothisstress,hegetsblackoutswheneverhehearsdissonancesWhenhefindshimselfaftertheblackoutinadifferentquarterofthetown,hereturnshome,toreadinthepaperthatsomebodyinthatquarterwasmurderedAskinghelpfromadoctoratScotlandYardheisassuredthathehasnothingtodowithit,butheisadvisedtocutbackinhisworkandgetsomerelaxationlikeother,ordinarypeopleAtacheapmusicalhemeetsNetta,asinger,whoinspireshimforanewmotiveforhisconcertoButNettadiscoversthatthismotivecouldalsobeusedasasongforherThesonggetssold,andshehangsaroundGeorgetogetmoresongsoutofhimGeorgebelievesthatNettaisinlovewithhim,andgetsinanargumentwithhisgirlfriendBarbara,thedaughterofLordHenry,whowantstheconcertoforoneofhissouaresGeorgehasanotherblackout,