Widowed Mary Bolton, like Miss Jean Brodie, considers herself in her prime. Not satisfied with car boot sales, dances at the bowling club and reading to the elderly, she throws herself into bellringing with gusto - much to the annoyance of her neighbours. But when the industrious Mary is found swinging from a bell rope, Jessica Brand - who only days before had threatened to strangle Mary with the very same rope - fears she will be accused. There's nothing left to do but call in private detective Agatha Raisin to untangle the web of sex, money, deceit ... and murder.