As high summer bakes the rich earth of north-east Herefordshire, dark shadows gather around a converted hopkiln where the last owner was savagely murdered. Though the local vicar dismisses claims by its current occupants that the place is haunted, their story is soon splashed over a Sunday newspaper - and Merrily Watkins is directed by the Bishop of Hereford to defuse this situation. Merrily, however, is already contending with a woman's claim that her adopted teenage daughter is possessed by an evil spirit. In both cases Merrily remains unconvinced, but in this summer of oppressive heat and sudden storms, nothing is ever quite what it seems.