Autumn, 1921. Lady Eleanor Swift is invited to her old school, St Mary’s, as a guest speaker. Her favorite teacher, Mrs. Wadsworth, has asked that Eleanor talk about her intrepid travels around the globe - travelling the Silk Road by bicycle, crossing the Himalayas and even befriending the Maharaja of India. But in the circumstances, perhaps it would have been a good idea to talk about her career as a daring detective. Because no sooner has Eleanor brushed up on her times tables than she is greeted by terrible news: Mrs. Wadsworth has been murdered.

Summer 1923. Lady Eleanor Swift is finally persuaded by her butler, Clifford, to take a villa in the south of France for the season. She plans to do what a glamorous lady abroad should: long lunches on the balcony followed by lazy afternoons lounging by the pool. But when Clifford examines the wine cellar, he discovers there are no decent reds, but there is a very dead body. The victim is famous American movie-star Rex Armstrong. Poor Rex seems to have been stabbed with a sword from the film set. So how did he end up in Eleanor’s villa?

Onetime adventurer and now amateur sleuth Lady Eleanor Swift is attending the annual royal regatta with her new pal Tipsy Fitzroy. Tipsy has Eleanor trussed up like a debutante in a new dress, determined to turn her into a proper society lady. Even Eleanor’s favorite companion, Gladstone the bulldog, has a new outfit for the occasion. But the sparkling prize-giving ceremony is interrupted when the devilishly handsome host gulps his glass of champagne on stage and collapses to the floor. The victim is none other than the king’s cousin, Lord Xander Taylor-Howard.

Spring, 1921. Lady Eleanor Swift, explorer extraordinaire and accidental sleuth, hasn’t had a vacation since she arrived in England a year ago. So she books into the Grand Hotel in the fashionable resort of Brighton for some fresh air, fish and chips, and, of course, a dip in the ocean. Eleanor is enjoying her view of the waves and trying to find her bathing suit when calamity strikes: A guest has been found dead at her beautiful hotel. The distraught manager, who can’t afford a scandal, asks Eleanor to solve the case as swiftly as possible.

Winter, 1920. Amateur sleuth Lady Eleanor Swift is feeling festive. She is playing host to the entire village at Henley Hall. She’s also purchased perfect presents for each of her household - not forgetting the biggest bone in the butcher’s shop for her partner in crime, Gladstone the bulldog - and is looking forward to celebrating her first English country Christmas. As snowflakes fall, Eleanor is cheering on contestants in the traditional Christmas fun run in the grounds of the hall. But tragedy strikes when one of the runners drops dead at the finish line.

Kitty Underhay is accompanying her fiancé, Matthew Bryant, and Bertie, his new cocker spaniel, on an outing to Torbay Country Club. However, the delightful day soon turns to disaster. Walking Bertie in the shaded grotto after an exhilarating archery demonstration, Kitty makes an unsporting discovery: the body of their host, Sir William Winspear, with an arrow in his back.

1934. Accidental amateur sleuth Kitty Underhay is being escorted by ex-army captain Matthew Bryant on an errand of mercy, as she takes a basket of grapes to her nemesis Mrs. Craven, who is recuperating from a recent operation. But their arrival at Elm House Nursing Home coincides with the mysterious death of Lady Wellings, a long-term resident.

The year 1934. Kitty Underhay steps out of the battered Rolls Royce and onto the graveled driveway of Thurscomb Castle in deepest Yorkshire. She’s honored to be a bridesmaid at her cousin Lucy’s wedding to the reluctant Lord Rupert Woodcomb, but as family and friends gather for welcome drinks, Kitty dodges intrusive questions about her own marital status by taking a stroll about the castle grounds. As she passes through the manicured gardens, a fatal shot rings out....

England, 1920. Eleanor Swift has spent the last few years travelling the world: taking tea in China, tasting alligators in Peru, escaping bandits in Persia and she has just arrived in England after a chaotic 45-day flight from South Africa. Chipstone is about the sleepiest town you could have the misfortune to meet. But then, from the edge of a quarry, through the driving rain, Eleanor is shocked to see a man shot and killed in the distance. Before she can climb down to the spot, the villain is gone and the body has vanished.

Kitty Underhay is looking forward to a week of long lunches and wedding planning with her husband-to-be, Captain Matthew Bryant. But the plan is derailed when he is called on to collect a former comrade-in-arms, arriving on the 15:50 from Paddington. As the train bearing Simon Travers pulls up to the platform, a piercing scream rises over the screech of its brakes. Travers is dead in his seat, a dagger in his heart. Only a few individuals had access to Travers’s compartment, and Kitty must find out which of these seemingly benign passengers is, in fact, a cross-country killer.

March, 1925. Pregnant, bored, and longing for an adventure, Posie Parker accepts a rather last-minute wedding invitation from an old friend who is getting married out in the gorgeous town of San Gimignano, Tuscany. But what Posie - and her husband Richard Lovelace - arrive into is not a blissfully happy wedding party, at all. It’s a chaotic mix of mistrust, unfaithful fiancées, bizarre death threats, uninvited wedding guests, and a big dollop of very real unease.

With the social season just around the corner, the women in Cleo’s family are having new outfits made by the most sought-after designer in the city. Madame Poitiers is bold, self-absorbed, and not French, despite her claims. When Cleo stumbles on her dead body in the salon, she is in a unique position to gather clues and speak to witnesses. But she doesn’t expect to find Harry Armitage’s business card in Madame’s possession. What is the alluring private detective’s connection to the victim? And why is he avoiding Cleo? 

Discreet sleuth for the high society set Olive Belgrave is delighted with her new flat at South Regent Mansions, where she’s made several friends, including the modern career woman, Minerva, who draws a popular cartoon about a flapper for a London newspaper. But then Minerva comes to Olive for help after catching a glimpse of a disturbing sight - a dead body. At least, that’s what Minerva thought she saw, but there’s not a dead body anywhere in the posh building, and the residents are continuing with their lives as they normally do. Is Minerva seeing things?

November 1933. Amateur sleuth-cum-dutiful granddaughter Kitty Underhay stifles a sigh of boredom as she attends the annual Hoteliers' Association Dinner and Dance on behalf of her grandmother, the proprietress of the Dolphin Hotel. She hopes the company of ex-army captain Matthew Bryant will enliven the otherwise dull evening. That is, until bullish and overbearing local councilor Harold Everton drops dead into his bowl of consommé. 

December, 1925. A dark, smog-filled London doesn’t seem very Christmassy or exciting, but then Posie Parker, London’s premier female private detective, receives an urgent call from one of her oldest friends: Rufus, Earl of Cardigeon. Summoned to The Mermaid, an ancient hotel in Rye on the Sussex Coast, in the heart of smuggling country, Posie, together with her husband Richard, finds her friend in a real state. As the snow falls and Christmas lights go up, secrets are revealed, and Posie becomes involved in perhaps her most personal case so far.