When a body is found surrounded by ritual symbols on the eve of a Psychic Fayre, Barnaby must step into the spiritual world of mediums, psychics, and occult followers to find the killer. Guest stars include Tracy-Ann Oberman (Escape to The Chateau) and Caroline Lee-Johnson (Chef).

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.