Thehalvesoftwobodies,onebelongingtoafemaleSwedishpolitician,arediscoveredinthemiddleoftheresundBridge,whichconnectsCopenhageninDenmarkwithMalminSweden.Thebody,cutinhalfatthewaist,hasbeenplacedpreciselyontheborderbetweenthecountries,thusfallingunderthejurisdictionofboththeDanishandSwedishpoliceagencies.Afterfurtherexamination,itturnsoutthatthebodyisthatoftwoseparatecorpses,withonehalfbelongingtoaDanishprostitute.SagaNorn,fromtheSwedishside,andMartinRohde,fromtheDanish,leadtheinvestigationtocatchthemurderer.[4][5]Theinvestigationquicklyescalatesasajournalist,DanielFerb,whosecarwasusedinthecrime,beginsreceivingphonecalls.Thecaller,whobecomesknownastheTruthTerrorist,claimstobecommittinghiscrimesinordertodrawattentiontovarioussocialproblems.Asocialworker,StefanLindberg,whosesisterbecomesavictimoftheTruthTerrorist,becomesanearlysuspect.However,eventssoonleadtheDanishandSwedishteamstoconcludethatthekillerhasconnectionstothepolice.Theydiscoverthatthecrimeshavebeenplannedoveraperiodofseveralyears.ThetraileventuallyleadsthemtoJens,aDanishpolicemanandformerclosefriendofMartins,whowasthoughttohavecommittedsuicideafteranaccidentonthebridgecausedthedeathsofhiswifeandson.Inthecourseoftheinvestigation,MartinandSagadevelopacloseworkingrelationship,althoughtheyareverydifferentpeople.Martinhasatwenty-yearoldsonfromhisfirstmarriage,August,whoisnowlivingwithMartinandhiscurrentwife,Mette,bywhomMartinhasthreechildren;afterMartinhashadavasectomy,Mettediscoversthatsheisexpectingtwins.Sagalivesaloneanddoesnotseemtofeelsheneedsaseriousrelationship,insteadpickingupmeninbarsforcasualsex.SheappearstohavesymptomsconsistentwithAspergersyndrome,resultingindifficultyestablishingrelationshipsandfeelingsofinadequacyinmanagingpeople;sherefusesapromotionforthislatterreason.Afterthekillerhasmurderedseveralpeopleandsuccessfullythrownredherringsinthewayoftheinvestigation,histruepurpose-tostrikeatMartinhimself-eventuallybecomesclear.Jens,nowcallinghimselfSebastianSandstrod,firstapproachesMette,whoissusceptibletohisadvances,afterlearningthatMartinhassleptwithCharlotteSringer,awomanwhoisperipherallyinvolvedintheinvestigation.SebastianluresMetteandherchildrentoaremotespotwherehesubjectsthemtoaterrifyingordeal,lockingtheminwitharoomandgivingherahandgrenadewithitspinremovedtoholdaslongasshecan.However,SagarealisesthatAugustistherealtarget.Theinvestigationculminatesinaconfrontationonthebridge,whereshecannothelpbuttellMartinwhathappenedtoAugustandhastofireathiminordertopreventhimdestroyinghiscareerbykillingSebastian,thekillersfinalintention.