TheseriesisaboutaCustomsOfficer,MarcusAshtonAshwhoisrecruitedtoanewlawenforcementteamtaskedwithhuntingdownsomeofBritain"smostwantedcriminalsTheseriesisinspiredbythebookofthesamenamewhichdetailsthecareerofformercustomsagentCameronAddicott,writtenbyKrisHollington