AC-12-yksikkö pureutuu poliisikorruption ytimeen paljastaen valheita, vallan väärinkäyttöä ja vaarallisia salaisuuksia, jotka vievät heidät yhä syvemmälle varjomaailmaan.
DCI Roz Huntley is under intense pressure from her superiors to apprehend a murderer.
AC-12 crank up their investigation into Operation Trapdoor.
AC-12 wrestle with the new forensic evidence.
Roz's husband Nick is brought in for questioning by AC-12.
Roz struggles to allay her husband's suspicions. AC-12 find a new angle to pursue.
While Nick Huntley faces lengthy questioning, AC-12 remain convinced of Roz's involvement.