Narrated in the first person, the transforming events of Peter's life as a 15 year old are told years later. The opening paragraphs set the scene: "the older brother who went off to school" leaving "the brilliant . . . mother . . . bereft"; the father, "son of a bankrupt Hudson Valley apple grower"; "the darkening drift and dismay of my parents." Into this family unease steps the local veterinarian, Dr. Mason, whom Peter assists during after-school hours, and who is a sometime dinner guest in his parents' home.
Dr. Mason not only tries to persuade Peter to go into a medical profession, ignoring Peter's interests (writing poetry, reading about mountain climbing) but self-importantly insists on "offering [him] lessons in nothing less than all of life" (63). Dr. Mason, we learn, is singularly unqualified to dispense such lessons. He is, at least in Peter's eyes, overbearing and insensitive in his interactions with the owners of the pets he treats, and perhaps even unethical in his professional decisions. Then, Peter discovers, his mother is having an affair with Dr. Mason (who is also married). It is the burden of this knowledge that drives the narrative.
