Midsomer Barrow landowner Gareth Heldman is murdered with an Iron Age spear, on the same spot where his father was killed many years before during an archaeologists' dig at the village's prehistoric earthworks. Meanwhile, troupes of new age travellers (whom Heldman strongly disapproved of) are arriving to celebrate the summer solstice on June 21st. Barnaby finds Heldman was a womaniser, with a tangled web of offspring. He also has to reopen the file on the thirty-year-old murder of Roger Heldman and investigate a tale of lost treasure.

Jamie Cruickshank, a bartender at the Maid in Splendour public house, is keen on Bella Monday, a barmaid, and follows her to a tumbledown old cottage in the woods, only to be blasted with a twelve-bore shotgun. Then the pub landlord's son, Stephen Bannerman, is also killed in the same way. Barnaby finds there was ill-feeling between locals and newcomers to the village and also between the landlord and his aggressive son, who was in the process of taking over the business.

John Ransom is found murdered with suspicious burn marks to his head. The investigation leads to two feuding families - one with the ability of second sight.

When retired music teacher Arthur Leggott is battered to death with a torch, Barnaby and Scott investigate a web of family feuds and long lost love affairs to discover the truth.

Frank Hopkirk, an environmental adviser on the proposed site of a controversial Goodfare supermarket in Elverton-cum-Latterly, is found stabbed to death in an old farm building on the site. Barnaby & Jones question locals on both sides of the debate over the plans, and find that Mr Hopkirk had extra-curricular dealings with a number of the local ladies and their businesses. But which one of these caused passions to be stirred up to such a murderous extent?

Annie Woodrow, a charity worker from Midsomer Malham, is standing trial for killing her best friend, Frances Trevelyan, in a case that Barnaby had investigated ten months previously. But he becomes increasingly unsettled that the prosecution's case doesn't match the facts. Barnaby & Jones enlist the help of key witness Mrs Beverly in a risky entrapment to find out what really happened. Jones's promotion to Det Sgt comes through at the same time.

There's a shock for Joyce when she and Tom visit a photo exhibition in Luxton Deeping. Barnaby also gets a glimpse of the bitter rivalry between the traditional film photo followers and the digital enthusiasts. Things develop a more serious turn, however, when a member of the local camera club is brutally strangled. For once there are no shortage of clues and leads, all pointing to one suspect - Barnaby himself !! Suspended from duty, Barnaby, with a little covert help from Jones, has to use all his deductive powers to discover the motive and unmask the real murderer before they strike again.

Although it's 90 years since the end of WW1, the feud between the Hammond and Hicks families still festers. Much to the disgust of Colonel Henry Hammond, Private Tommy Hicks condemned for cowardice in the conflict, has been exonerated and his name added to the local war memorial. Meanwhile Barnaby is not a happy man. His roof is leaking and his peaceful dinner with Joyce at the local hostelry is interrupted when he has to break up a fight between the two elderly patriarchs of the Hicks and Hammonds families who, despite being wheelchair bound, battle it out with baguettes!

Reformed criminal Ronnie Tyler prepares to leave Midsomer Holm, a tranquil village and halfway house. In the village is an historic camera obscura. New arrival Eddie Marston takes Ronnie's place, making DCI Barnaby uneasy.

Jean Wildacre dies suspiciously during a performance as assistant to local magician Aloysius Wilmington, and Barnaby & Jones are called in. They have to investigate the relationships of Midsomer's Magic Circle, a group of old friends whose activities spun off a new cult, and led to long-running animosities. Soon they are looking for colorful South American poison-dart frogs, as the death count rises