Garway church was built by medieval Knights Templar, and after seven centuries, the Welsh Border village is still shadowed by their mysteries. A few fields away, the Master House, abandoned and falling into ruin, has been sold to the Duchy of Cornwall. But renovation plans stall when a specialist builder refuses to work there, insisting it's a place that doesn't want to be restored. Directed by the Bishop of Hereford to investigate, Merrily Watkins is wary of being used and suspicious of the people she's supposed to be helping. But violent death changes everything, and Merrily uncovers hidden layers of sin and retribution in a secretive landscape.