Elizabeth Mapp-Flint of Tilling is approaching her fiftieth birthday, and plans a party to celebrate the event. However, as so often happens in Tilling, things don't go entirely according to plan, as Major Benjy, her husband, over-refreshes himself at the party, and presents her with an entirely unwelcome birthday gift. Meanwhile, Emmeline ("Lucia") Pillson and her husband Georgie, together with the rest of Tilling look on as Elizabeth's sister,...