The village of Midsomer Parva is dominated by the imposing Devington School - as a seat of learning, Devington may be undistinguished in the great world, but it is socially well-connected and it has economic clout. When the College's Pudding Club sets off a murderous chain of events, ranks begin to close against Barnaby and Troy, and they need inside information to catch a killer who is obsessed by loyalty to the school.