The murder of Colonel Protheroe is a shock to everyone in St. Mary Mead, though hardly an unpleasant one. Now the vicar, who had declared that killing the detested Protheroe would be a service to the world, as well as his young and flirtatious wife, could be considered suspects. And what about the faithless Mrs. Protheroe, or her lover, the young artist Lawrence Redding? Jane Marple is at her shrewdest in this delightfully intricate mystery.