Merrily is on a quest for answers after a murder, a desecrated church and a clergyman's apparent 'suicide'. She suspects a Satanic group may be at work, and is guided through a ceremony of lesser exorcism by Huw Owen, but nothing can prepare her for what she is about to uncover.
Elenco: Anna Maxwell Martin , David Threlfall , Ben Bailey Smith , Siobhan Finneran , Leila Mimmack , Sally Messham , David Sterne .