While out collecting some Portuguese laurel for the formidable flower arranger Mrs Dawes, feisty widow Ellie Quicke comes across a dead body - a corpse without an identity. Next day, Mrs Dawes is discovered by Ellie and her grandson, Frank, badly beaten and close to death. Much to Ellie's dismay, the police think shaven-headed Neil, Mrs Dawes' grandson, is responsible, even after a third body comes to light.

Bea Abbot and her husband have been running a highly successful domestic agency for many years, but when he falls ill and dies, she is pressured by her MP son and novelist daughter to retire. Bea is so tired from the long years of nursing her husband that all she wants is peace and quiet, and to have her pretty early Victorian house in Kensington, London, all to herself. What she gets is a couple of young lodgers with troubled backgrounds and an old friend banging on her door, asking for help.

Recently divorced and reluctantly retired, Julia Bird has fled London to enjoy idyllic rural life in the Cotswolds. Determined to have the perfect English garden, her first job is to tear down the old shed, where she unearths much more than she’d bargained for: a body, apparently buried for decades. But who could it be, and who killed them? The police draw a blank, and even the gossip-fest that is the local book club can’t remember anyone going missing in the village.

In a peaceful retirement village, four unlikely friends meet weekly in the Jigsaw Room to discuss unsolved crimes; together, they call themselves the Thursday Murder Club. When a local developer is found dead with a mysterious photograph left next to the body, the Thursday Murder Club suddenly find themselves in the middle of their first live case.

Fiona, Sue, and Daisy, three retired ladies who volunteer at the local charity shop, Dogs Need Nice Homes, can’t believe their favorite customer is dead. Eighty-six-year-old Sarah Brown was found murdered in her hallway by her delivery man, a domino clutched in her hand—with a name scratched on it. When another person is found dead with a domino in their hand, and with the police making no progress, the ladies will need to help unmask a serial killer. At least they have Fiona’s scruffy-haired terrier cross to assist them.