HauntedbythememoryofWalterHolderlin,asoldierhekilledduringWorldWarI,FrenchmusicianPaulRenard(PhillipsHolmes)confessestoapriest(FrankSheridan),whograntshimabsolution.Usingtheaddressonaletterhefoundonthedeadman'sbody,PaulthentravelstoGermanytofindhisfamily. Asanti-FrenchsentimentcontinuestopermeateGermany,Dr.Holderlin(LionelBarrymore)initiallyrefusestowelcomePaulintohishome,butchangeshismindwhenhisson'sfiancéeElsaidentifieshimasthemanwhohasbeenleavingflowersonWalter'sgrave.Ratherthanrevealtherealconnectionbetweenthem,PaultellstheHolderlinfamilyhewasafriendoftheirson,whoattendedthesamemusicalconservatoryhedid. Althoughthehostiletownspeopleandlocalgossipsdisapprove,theHolderlinsbefriendPaul,whofindshimselffallinginlovewithElsa(NancyCarroll).WhensheshowsPaulherformerfiancé'sbedroom,hebecomesdistraughtandtellsherthetruth.SheconvinceshimnottoconfesstoWalter'sparents,whohaveembracedhimastheirsecondson,andPaulagreestoforegoeasinghisconscienceandstayswithhisadoptedfamily.Dr.HolderlinpresentsWalter'sviolintoPaul,whoplaysitwhileElsaaccompanieshimonthepiano. Thefilm'soriginaltitle,TheManIKilled,waschangedtoTheFifthCommandmenttoavoidgivingwrongimpressionsinthemindsofthepublicaboutthecharacterofthestory.ItultimatelywasreleasedasBrokenLullaby.，我杀了谁的凶手是谁，我杀死了谁，我杀了他的凶手到底是谁，小说我杀了他的凶手是谁?，杀死我的凶手,你们知道是谁，我杀了他的凶手官方解释，我杀了他到底是谁杀了他，杀死那个我，小说我杀了他的凶手到底是谁，我杀了他的凶手是谁啊