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.

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