Causton villagers take a bus trip to visit a seaside resort in Brighton, for a ceremony. A serial killer, decapitates some travelers both in Causton and Brighton. DCI Tom Barnaby's cousin, DCI John Barnaby, work together to solve the case.

A tailor dies of a heart attack. Two years later, his widow is murdered on her way to the vicarage. The vicar is also murdered after receiving a mysterious letter.

A Wild West show comes to Ford Florey and a serial killer starts to eliminate villagers in a "wild west" fashion related to a parcel of disputed swamp land.

Jeff Bowmaker runs a profitable business in Midsomer Magna conducting spooky "ghost tours" at night when the unpopular village librarian turns up dead.

A gifted young pianist with emotional issues is in competition with other young talents for a scholarship in a prestigious private musical academy.

A group of conservationists object to the development of a pristine part of the village and adherents from both sides become victims of a mysterious killer.

Joyce talks Barnaby into enrolling in a spa located in a remodeled manor house but the bodies start to pile up when he's there.