A postman is brutally murdered on his morning round in the hamlet of Goodman's Land. Local WPC Jay Nash helps Barnaby and Troy to establish that Dave offered a very personal service to the female villagers, leaving a trail of jealous husbands in his wake, and it becomes clear that the tiny village is riven with other adulterous affairs. Then the body count begins to go up...
Meanwhile, romance is blossoming between Troy and Jay.
Hastings is staying with the Inglethornes and finds Emily Inglethorne murdered. With the whole household under suspicion, Hastings sends for his old friend Hercule Poirot.