The Last Barrel of Oil talks about the exploitation of the resources of lesser developed countries by "first world countries." There is also a parallel story of exploitation of a different kind - rape. How do we stop the exploitation and how do we live after? Will exploitation end when oil ends? Or do the 'supreme ones' simply move on to another commodity, nation, or people? Richard Martin is an American economist and presidential advisor. He is concerned with the direction in which the world is being steered by the oil-producing countries and plots with an Englishman, Brian Smith, and a Nigerian, Ajani Oni, to corner the plastics waste industry. He risks his marriage and career, so that he can stake a claim on financial security for his family. His wife, Sherry, is a beautiful, athletic, intelligent, and successful corporate lawyer. Lately, she has not provided him the solace she once had. This worries her. Was there someone else? As a university student, their son, Jacob, strives to show that he has the same economic prowess as his father. Desire for a mysterious, Nigerian classmate, Zaria, and an allegation of sexual assault threaten to derail his ambitions.