Inspector Banks investigates the death of a disgraced college professor. Since being dismissed from his job for sexual misconduct four years previously, he has been living a poverty-stricken and hermit-like existence in this isolated spot. There are many suspects, mostly at the college where he used to teach, but Banks, much to the chagrin of Detective Chief Superintendent Gervaise, soon becomes fixated on Lady Veronica Chalmers, who appears to have links with the victim going back to the early '70s at the University of Essex, then a hotbed of political activism.