Inthesummerof2006,RobReilly(KillianScott),asmartsuitedhomicidedetectiveandhispartnerCassie(SarahGreene)aredispatchedtoinvestigateachild’smurderandfindacommunitycaughtbetweenoldandnewIreland. 　　Onanaltarliesthebodyofalocalteenagegirl,precociouslytalentedKatyDevlin(AmyMacken).Herbodyisfoundinthemiddleofanarcheologicalsite,threatenedbylocaldevelopersaimingtobuildashinynewmotorway.Theneighbouringestate,Knocknaree,hasneverquitegotitsshareofthe‘CelticTiger’andhasbeenblightedbypovertyandunemploymentforgenerations. 　　Moreover,thisisthenotthefirsttimeachildofKnocknareehasbeenlost:21yearsearlier,inaverydifferentIreland,threechildrenwentmissingandonlyoneevercamebackalive. 　　Memoryrunsdeepinthispartoftheworld,andlocals,pressandtheDublinPoliceworrythatthecasesarelinked.