The annual harvest fair and the daredevil riders of the Wall of Death arrive in the Midsomer village of Whitcombe Mallet. But when the owner of an equestrian centre is trampled by his horse, DCI Barnaby and DS Nelson, along with the expertise of forensic pathologist Kam Karimore, must unravel a complex feud from the past. However, nothing is as it seems, and they are in a race against time as they work to solve the case.