Instead of spending her golden years lying down, the indomitable Hetty Wainthropp found her calling late in life. Combining common sense, her husband, and her pocketbook, this senior sleuth takes on all the cases the police deem too minor.

Diana and Deric have an ideal marriage: they thrive in each other's company, they're funny, and they enjoy their two grown children and Deric's dotty mother; the trouble is, Diana can no longer walk and her malady defies medical diagnosis. To care for Diana, Deric is letting his business slide, but at a civic luncheon, he is seated next to Aileen Armitage, a novelist who is blind. They have a nice time, and on the sly, Diana contacts Aileen to made an odd request. Diana's declining health and her resolve bring this triangle of unlikely friends to a surprising place.

Set during the 1960s in the fictional North Yorkshire village of Aidensfield, this enduringly popular series interweaves crime and medical storylines.

In 1950s England, slow-witted Derek Bentley falls in with a group of petty criminals led by Chris Craig, a teenager with a fondness for American gangster films. Chris and Derek's friendship leads to their involvement in the true case which would forever shake England's belief in capital punishment.