January 1889. As the newest member of the Curiosity Club - an elite society of brilliant, intrepid women - Veronica Speedwell is excited to put her many skills to good use. As she assembles a memorial exhibition for pioneering mountain climber Alice Baker-Greene, Veronica discovers evidence that the recent death was not a tragic climbing accident but murder.

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.

Retired schoolteachers Liz, Pat and Thelma never expected they would be caught up in a crime even once in their lives, let alone twice. But when poison pen letters start landing on the doorsteps of friends and neighbours in their Yorkshire village, old secrets come to light. With the potential for deadly consequences. It won’t be long until the three friends are out on a case yet again.

Sydney, 1965: After a chance encounter with a stranger, mild-mannered tea lady Hazel Bates becomes an accidental sleuth, stumbling into a world of ruthless crooks and racketeers in search of a young woman she believes to be in danger. In the meantime, Hazel's job at Empire Fashionwear is in jeopardy. The firm has turned out the same frocks and blouses for the past twenty years and when the mini-skirt bursts onto the scene, it rocks the rag trade to its foundations. War breaks out between departments and it falls to Hazel, the quiet diplomat, to broker peace and save the firm.

Meet Leda Foley: devoted friend, struggling travel agent, and inconsistent psychic. When Leda, sole proprietor of Foley's Flights of Fancy, impulsively re-books Seattle PD detective Grady Merritt’s flight, her life changes in ways she couldn’t have predicted. After watching his original plane blow up from the safety of the airport, Grady realizes that Leda’s special abilities could help him with a cold case he just can’t crack.