After a local photographer wins an urban myth competition with his creation of The Wolf Hunter, it unexpectedly gains a cult following. However, when a man is killed, Barnaby must investigate if this myth has become murderous reality. Guest stars include Mark Williams (Father Brown) and Louise Jameson (Doctor Who).

The town of Causton's detective chief investigator and his detective sergeant investigate the scandals and deadly deeds that lurk just beneath the well-manicured surface of the county of Midsomer. The series is bolstered by a rotating cast of investigators and many special celebrity appearances.