TheseriesbeginswhensuspectedhumanremainsareuncoveredonWhitneyMarsh-JessandSunnyareimmediatelycalledtothescene,abandoningtheireveningplanstoJess’shusband’schagrin.DrBalcombe’sanalysisrevealsthattheremainsarerelativelyrecentandsuggestagrimconclusion:thebodywasplacedtherealreadydismembered.Withthisinsight,JessandSunnyintensifytheirsearchcertainthatotherbodypartsmaynotbefaraway.　　Astheinvestigationunfolds,viewersareintroducedtoadiversenewcastofcharacters:MelindaRicci,anoutspokentelevisioncommentatorbasedinIreland;Martin‘Marty’Baines,anautisticmanlivingwithhismotherDotinDeal,Kent;AsifSyed,anAfghantrainingforhisUKcitizenshiptest;andJulietCooper,ahistorylecturerandfacultyheadataLondonuniversity.　　Whilethesecharactersliveseeminglyseparatelives,theyareintricatelyconnectedbytheirpasts.It’suptoJess,Sunny,andtheirdedicatedteamtouncoverthesehiddenlinksandultimatelyexposethetruthbehindthecoldcasemurder.