Over the course of the fun and vibrant series, Agatha will attempt to solve a number of mysteries in the Cotswolds, from the death of a local witch to the demise of a flirtatious young vet. The will-they-won’t-they relationship between Agatha and on-off love interest James will continue, meanwhile, as the pair pose as a married couple in order to solve a crime.
A walker is found dead on a local baronet's land soon after he declares war on her rambling group for trespassing on his land. Eager to solve the crime, Agatha convinces James that they should pose as a married couple and go undercover in the victim's walking group.
Bell-ringer Amanda Ballard is found hanged in the belfry with a suicide note left beside her, but Agatha is not convinced she took her own life and enlists a reluctant Roy to help her research the case.
Roy lures Agatha back into the world of PR. She represents a local mineral water company -- but a murder there throws a spanner in the works.
On the eve of the village's best kept garden contest many of the entrants' gardens are sabotaged. Shortly afterwards James' other half Mary, a keen contestant, is murdered, following a row between the couple. Since Mary's garden was left virtually untouched Agatha initially suspects one of the other contestants, all of whom hated her, but switches her opinion upon meting Mary's spoilt daughter and sole heir, Beth., being wrong on both counts. However a new lead is opened up on the discovery that Mary used to be a singer and music provides a clue to Agatha solving the murder - and for good measure she also identifies the garden vandals.
Agatha dates handsome vet Paul Bladen but next day he is murdered, injected with an overdose of horse tranquillizer whilst at Lord Pembury's stable. Agatha spots that Pembury has a motive, as do Percy Parr, whose wife Harriet was seeing Paul, and spurned receptionist Chloe Mabbs. Then a villager about to divulge a secret about the deceased to Agatha is also killed in the same way. When the murderer kidnaps Agatha's cat in an effort to get her to back off with her investigation this inadvertently provides a clue, enabling Agatha to solve the killings.
The day after Kylie Stokes' wedding to Zac Leeson the bride is murdered and Agatha promises her mother Freda she will find the killer. There are many intrigues surrounding the bridal party, including Kylie's affair with an older businessman whom she was seemingly blackmailing, a mysterious money gift given by Charlie Fraith and a jealous bridesmaid who apparently hated Kylie for stealing Zac from her . However it is an old photo in a local art exhibition which puts Agatha on the road to unmasking the killer.
Love is in the air for Agatha, but when a local mystic is found bludgeoned to death, she becomes embroiled in a most mysterious case.