Thestoryofhowpolicerepeatedlyallowedaserialmurderertoslipthroughtheirfingers.　　StephenPortdate-rapedandmurderedfouryounggaymeninEastLondonwithinfifteenmonthsanddumpedallfourbodieswithinafewhundredmetresofeachother.　　YetBarkingandDagenhampolicefailedtolinkthedeaths,untilweeksafterthefourthone.ThefilmtellsthestorythrougheyesofthefamiliesofPort'svictims,unpickinghowthepolicefailedtoproperlyinvestigateeachofthedeathsinturn.Thepolice'sassumptionsthattheseyounggaymenhaddiedfromself-inflictedoverdosesofchem-sexdrugsallowedPorttocontinuerapingandkillinginnocentyoungmen.　　ThefilmunravelsPort'ssinistercharacterandmodusoperandi.Portwasmotivatedbyadesiretosatisfyhislustforabusivedrugfuelledsexualencounters.Hefoundallhisvictimsthroughgaydatingandsocialmediasites,usingmultipleonlineprofiles.　　BarkingandDagenhampolice'sfailingshaveledtohugeangeramongstthefamiliesofPort'svictims.Somehaveaccusedthepoliceofinstitutionalhomophobia,andaskedifofficerswouldhaveinvestigatedmorethoroughly,hadfouryoungwomenturnedupdeadwithinsuchasmallradius.　　TheMetpolicehavereferredthemselvestotheIndependentPoliceComplaintsCommissionovertheirhandlingofthecaseandwillnotcommentonspecificallegationsuntiltheIPCCinvestigationiscomplete.