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