Agatha Raisin, a public relations professional, gives up her life in London in the hope of starting a new life in the seemingly quiet village of Carsley, but soon finds herself a suspect in a murder case when she enters the village's annual quiche-making competition in an attempt to ingratiate herself with the community. She sets out to clear her name and solve the mystery of the quiche of death.

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.

Agatha springs into action when James's girlfriend Mary is found dead shortly before the village gardening competition.

The Murderous Marriage: When Agatha's first husband is found dead in a ditch the day after stopping her wedding to James, she must race to prove her innocence.