A letter arrives at the police station claiming that the man convicted of murdering the Vicar of Belsham is innocent, but DI Wesley Peterson already has his hands full with threats made to local supermarket chain, Huntings. In this 8th case (after The Skeleton Room), archaeologist Neil Watson uncovers a medieval plague pit at a site near Belsham church earmarked for Huntings' new superstore. Soon Wesley concludes that the vicar's murder, the disappearance of a woman, and the threats to the supermarket may be linked in some way. But how?