Mma Precious Ramotswe and Mma Makutsi are approached by their colleague, Mr. Polopetsi, with a troubling story: a woman, accused of being rude to a valued customer, has been wrongly dismissed from her job at an office furniture store. Never one to let an act of injustice go unanswered, Precious begins to investigate, but soon she will be dealing with an unpleasant man from her past who has returned to Botswana, and—although Precious thought she knew all of her relatives—a mysterious local nurse named Mingie Ramotswe.