Everyone at the party had a secret. Someone killed to keep theirs. London, 1922. Draper’s daughter Marjorie Swallow is 24, independent, and determined to live life to the full. A secretarial post with enigmatic American detective Mrs Jameson looks just the ticket. And soon she’s in the thick of it. When the bohemian party they attend ends in murder, there is no shortage of suspects. Half of Bloomsbury wanted Mrs Norris dead – but who wielded the knife? Was it the handsome but troubled artist? The vivacious young actress? Or even the aristocratic lady novelist?

During 1958, with a predominantly male workforce, societal norms dictate women should be compliant, fashionable housewives. To Ariadne Winter, the sole tradition she aims to embrace is that of being fashionable. Amidst the ambiance of Ivy Tree Inn, where she's been dispatched as a writer for Ladies' Lifestyle magazine, her focus wavers as she grapples with an interview assignment concerning a Hollywood starlet on the cusp of royal matrimony—an event hailed as the "Wedding of the Century."

On November 4, 1872, Cathleen Kelsey's brother, George, goes missing after being tarred and feathered by a mob in their small Long Island town. Determined to find him and get justice, Cathleen reinvents herself as a detective. Cathleen Kelsey has always been her brother, Charles's, protector. An eccentric, Bohemian poet, Charles is a bit of an oddball in their small, Long Island town. When he goes missing on Election Eve in 1872, Cathleen discovers he has been tarred and feathered after a flirtatious girl accused him of entering her bedroom and molesting her.

When Lady Emma Grace Hastings receives a much-coveted invitation to the most auspicious Christmas party of the season—one that comes with a 10,000 pound prize for the winner of a mysterious game—she cannot believe her good fortune. But as the guests are assembled at Mistlethwaite Manor, the chilling intent of the game is revealed. Each guest has cause for alarm, because all of them have secrets, and to win the prize money, those secrets must be exposed.

London, 1941: Miss Jane Treen is at her desk, strong black coffee in hand and fluffy ginger cat by her side, when her top-secret government work is interrupted by an urgent call to Devon. A woman has been found dead in a lake in a place where she shouldn’t have been. Jane needs to gather the clues and find the killer before someone else from the agency gets hurt… Shy and handsome code-breaker Arthur Cilento is bewildered by the arrival of the efficient Miss Treen and her cat Marmaduke.