PartOne:　　Itstartswithaping.WhatunravelsisafrighteningcampaignofharassmentwhichthreatenstotearapartthelivesofyoungwomenfromacrosstheUK.Desperateforittostop,theysearchforanswers.　　PartTwo:　　AshockrevelationtakestheinvestigationtoasmalltowninCheshire.Askeyevidencemounts,onepoliceofficerisdeterminedtobringthesuspecttojustice.