After the gruesome discovery of a farmer's eviscerated body in an ancient stone circle in Midsomer Mow just days before the spring equinox, it's not long before suspicion falls upon the local Druids, even though there's no direct evidence linking them to any crimes.

DCI Barnaby and DS Jones investigate the cloistered world of Midsomer Priory when a nun is strangled to death. The detectives uncover a complex mystery involving holy orders, teenage romantic liaisons, African art, and missing antique silver as the community is forced to open its doors to 21st-century policing.