Inthefourthseason,awomanisfoundbrutallymurderedona求爱allartificialDanishislandclosetotheØresundBridge.ThewomanisMargretheThormod,Thormod,DirectorGeneraloftheMigrationAgencyinCopenhagen,whowasrecentlyembroiledinadeportationscandal.DanishdetectiveHenrikbeginstoinvestigatethemurderwithouttheinvolvementofSaga,duetothefactthatshehasnowbeenimprisonedforthemurderofhermother.Henriki求爱issinghiscolleagueandwantstovisitherasoftenaspossiblesoshecanhelpwiththecase.However,herpredicamentrendersherunabletohelp.Henrik’ssearchforhi求爱issingdaughtersisalsofrustratedbySaga’simprisonmentandhegetsclosetogivingup.