The mysterious return of a bloodthirsty serial killer...Dave Gurney, the most decorated homicide detective in the history of the NYPD, is still trying to adjust to life in upstate New York when a young woman who is producing a documentary on serial killers asks for his input. Soon after this conversation, odd events begin occurring in Dave's life: There is a strange problem with his tractor, a razor-sharp hunting arrow lands in his yard, and he narrowly escapes serious injury in a booby-trapped basement. As things grow more bizarre, Dave finds himself re-examining the case of 'The Good Shepherd' - which, 10 years before, involved a series of roadway shootings and a 'Unabomber-like' manifesto expressing rage at society. The killings ceased, and a cult of analysis grew up around the case with a consensus opinion that no one would dream of challenging - no one, that is, except Dave Gurney. Mocked even by some who'd been his allies in previous investigative outings, Dave is only heeded when the reawakened Good Shepherd proves by his actions that his agenda is more complex than previously thought.