The team must prove Neville's innocence after Professor Cartwright is murdered. DI Karen Flitcroft from the Department of Policing Standards takes over the investigation. The investigation leads Naomi and Selwyn to Justin West at the preppers commune.

When entrepreneur and family man, Gerry Stableforth, is found dead in a ravine, his family – wife, Bella, children Benjamin, Mariana, and niece Riley - are left in shock. As DI Neville Parker, DS Naomi Thomas, Officer Marlon Pryce and Trainee Officer Darlene Curtis set to work on cracking this mysterious death, things take a turn as the family's visiting digital marketing guru, Debbie Clumson, suddenly disappears. Once news of Debbie's disappearance reaches home, her hapless partner, Dave, is determined to find out what happened to her.