DS Jimmy Suttle is called to a brutal murder in the picturesque Devon village of Lympstone. Harriet Reilly, a local GP, has been found disembowelled in the bedroom of her partner, climate scientist Alois Bentner. Suttle's estranged wife, Lizzie, has abandoned Portsmouth, moved to Exeter and returned to journalism, hearing rumours of a local GP offering mercy killings to patients meeting certain criteria. The name of the GP is Harriet Reilly. So begins two investigations of the same crime. Operation Buzzard, with D/S Suttle at its heart, and Lizzie, piecing together her own version of the events that led to Harriet Reilly's death. The fourth novel in the Jimmy Suttle series is a story of ultimate betrayal, reaching much further and wider than its Devon roots.