Thehalvesoftwobodies，onebelongingtoafemaleSwedishpolitician，arediscoveredinthemiddleoftheØresundBridge，whichconnectsCopenhageninDenmarkwithMalmöinSweden.Thebody，cutinhalfatthewaist，hasbeenplacedpreciselyontheborderbetweenthecountries，thusfallingunderthejurisdictionofboththeDanishandSwedishpoliceagencies.Afterfurtherexamination，itturnsoutthatthebodyisthatoftwoseparatecorpses，withonehalfbelongingtoaDanishprostitute.SagaNorén，fromtheSwedishside，andMartinRohde，fromtheDanish，leadtheinvestigationtocatchthemurderer。 [4] [5] Theinvestigationquicklyescalatesasajournalist，DanielFerbé，whosecarwasusedinthecrime，beginsreceivingphonecalls.Thecaller，whobecomesknownasthe“TruthTerrorist”harendelituakegitendirelaeskatzendu，要注意各種社會問題erakartzeko.Gizartelangilea的，StefanLindberg，arrebaTruthTerrorist-enbiktimaizanzen，da.Halaere嫌疑人之前，gertaeraklasterdani-eskusuediartaldeakestaltzendutepolitikeramantzendute 。Ralyears ThetraileventuallyleadsthemtoJens，在aDanishpolicemanandformerclosefriendofMartin whowasthoughttohavecommittedsuicideafteranaccidentonthebridgecausedthedeathsofhiswifeandson.Inthecourseoftheinvestigation，MartinandSagadevelopacloseworkingrelationship，althoughtheyareverydifferentpeople.Martinhasatwenty-yearoldsonfromhisfirstmarriage，八月，whoisnowlivingwithMartinandhiscurrentwife，梅特，bywhomMartinhasthreechildren：afterMartinhashadavasectomy，Mettediscoversthatsheisexpectingtwins.Sagalivesaloneanddoesnotseemtofeelsheneedsaseriousrelationship， insteadpickingupmeninbarsforcasualsex.SheappearstohavesymptomsconsistentwithAspergersyndrome，resultingindifficultyestablishingrelationshipsandfeelingsofinadequacyinmanagingpeople：sherefusesapromotionforthislatterreason.Afterthekillerhasmurderedseveralpeopleandsuccessfullythrownredherringsinthewayoftheinvestigation，histruepurpose-tostrikeatMartinhimself-eventuallybecomesclear.Jens，現在自稱塞巴斯蒂安Sandstrod第一慈光，whoiss usceptibletohisadvances，afterlearningthatMartinhassleptwithCharlotteSöringer，awomanwhoisperipherallyinvolvedintheinvestigation.SebastianluresMetteandherchildrentoaremotespotwherehesubjectsthemtoaterrifyingordeal，lockingtheminwitharoomandgivingherahandgrenadewithitspinremovedtoholdaslongasshecan.However，SagarealisesthatAugustistherealtarget.Theinvestigationculminatesinaconfrontationonthebridge，whereshecannothelpbuttellMartinwhathappenedtoAugustandhastofireathiminordertopreventhimdestroyinghiscareerbykillingSebastian，theka勒爾的最終目的。