Retired Bay St. Lucy teacher and principal Nina Bannister is shocked to find, during one of her morning exercise runs, the body of an ex-student and brilliant petroleum engineer who has been drowned in one of the town's drainage canals. Her search for the killer leads her to Lafayette, Lousisana, center of Cajun culture and Gulf Coast oil production, and to the massive deep water oil rig Aquatica. Murder, suspense, and high intrigue accompany this long overdue Oil Change.