Based on the novel of the same name by Edith Wharton, it is about a husband and wife (Ethan and Zeena), who need an extra hand around the house due to Zeena's debilitated body and constant illness. The young woman who joins them is a beautiful, spirited person. She and Ethan fall in love much to the dismay of Zeena.

Joey Drayton brings her fiancé, Dr. John Prentice, home to sunny San Francisco to meet her affluent parents. Their liberal persuasions are now put to the test, for although the young man is an ideal choice (he's highly and internationally respected in the medical field, and he's impeccably mannered, handsome, well dressed and of a respectable California family), he's black. The film, which covers one busy day in the Drayton home, is essentially a drawing-room comedy, a series of cross-conversations between the young doctor and the girl's parents, and finally between all sets of parents and offspring. A simple dinner is extended to include the doctor's parents, who fly up from Los Angeles for the evening, and the crusty but benevolent old Irish priest, a friend of the family. Thus, the title of the film . . .