When their father's death leaves them impoverished, Sarah Summers and her genteel sisters fear they will be forced to sell the house and separate to earn livelihoods as governesses or companions. Determined to stay together, Sarah convinces them to open their seaside home to guests to make ends meet and provide for their ailing mother. Instead of the elderly invalids they expect to receive, however, they find themselves hosting eligible gentlemen. Sarah is soon torn between a growing attraction to a mysterious Scottish widower and duty to her family.

When the Germans march into Denmark, Baron Henrik Ahlefeldt exchanges his nobility for anonymity, assuming a new identity so he can secretly row messages for the Danish Resistance across the waters to Sweden. American physicist Dr. Else Jensen refuses to leave Copenhagen and abandon her research-her life's dream. While printing resistance newspapers, she hears stories of the movement's legendary Havmand-the merman-and wonders if the mysterious and silent shipyard worker living in the same boardinghouse has something to hide. 

Katherine Schneider’s life as a dentist in 1913 New York is upended when a patient reveals details of a deadly plot while under the influence of laughing gas. As she is plunged into danger, she seeks help from the dashing Lieutenant Jonathan Birch, a police officer she has long admired from afar.

Patrick O'Neill survived a hardscrabble youth to become a lawyer for the downtrodden Irish immigrants in his community. He's proud of his work, even though he struggles to afford his ramshackle law office. All that changes when he accepts a case that is sure to emphasize the Blackstones' legacy of greed and corruption by resurrecting a 30-year-old mystery. Little does Patrick suspect that the Blackstones will launch their most sympathetic family member to derail him. 

As 1754 is drawing to a close, tensions between the French and the British on Canada’s Acadian shore are reaching a fever pitch. Seamstress Sylvie Galant and her family—French-speaking Acadians wishing to remain neutral—are caught in the middle, their land positioned between two forts flying rival flags. Amid preparations for the celebration of Noël, the talk is of unrest, coming war, and William Blackburn, the British Army Ranger raising havoc across North America’s borderlands.

In 1942, an impulsive promise to her brother before he goes off to the European front puts Avis Montgomery in the unlikely position of head librarian in small-town Maine. Though she has never been much of a reader, when wartime needs threaten to close the library, she invents a book club to keep its doors open. The women she convinces to attend the first meeting couldn't be more different—a wealthy spinster determined to aid the war effort, an exhausted mother looking for a fresh start, and a determined young war worker.

In the summer of 1933, a man named Adolf Hitler is the new and powerful anti-Semitic chancellor of Germany. But in Los Angeles, no-nonsense secretary Liesl Weiss has concerns much closer to home. The Great Depression is tightening its grip, and Liesl is the sole supporter of two children, an opinionated mother, and a troubled brother.

Rome, 1943. With the fall of Italy’s Fascist government and the Nazi regime occupying the streets of Rome, British ballerina Julia Bradbury is stranded and forced to take refuge at a hospital on Tiber Island. But when she learns of a deadly sickness sweeping through the quarantine wards—a fake disease known only as Syndrome K—she is drawn into one of the greatest cons in history. Alongside hospital staff, friars of the adjoining church, and two Allied medics, Julia risks everything to rescue Jewish Italians from the deadly clutches of the Holocaust.

When German bombs set London ablaze, BBC radio correspondent Hugh Collingwood reports on the Blitz, eager to boost morale while walking the fine line between truth and censorship. But the Germans are not the only ones Londoners have to fear as a series of murders flame up amid the ashes. The deaths hit close to home for Hugh, and Aleida needs his help to locate her missing son. As they work together, they grow closer and closer, both to each other and the answers they seek. But with bombs falling and continued killings, they may be running out of time.

Left with an estate on the brink of bankruptcy after their father's death, Lady Marigold Fairfax and her brother open a private investigation firm marketed to the elite . . . to spy on the elite. Dubbed The Imposters, Ltd., their anonymous group soon becomes the go-to for the crème of society when they want answers delivered surreptitiously. But the many secrets Marigold learns about her peers pale in comparison to her shock when she and her brother are hired to investigate her best friend's father as a potential traitor.

Peggy Serrano couldn’t wait for her best friend to come home from the war. But the Jimmy Barnett who returns is much different from the Jimmy who left, changed so drastically by his experience as a medic in Europe that he can barely function. When he attempts the unthinkable, his parents check him into the VA hospital. Peggy determines to help the Barnetts unravel what might have happened to send their son over the edge. She starts by contacting Jimmy’s war buddies, trying to identify the mysterious woman in the photo they find in Jimmy’s belongings.

When Miss Rebecca Lane returns to her home village after a few years away, her brother begs for a favor: Go to nearby Swanford Abbey and deliver his manuscript to an author staying there who could help him get published. Feeling responsible for her brother's desperate state, she reluctantly agrees.  

The beloved daughter of Jewish captives in Babylon, Keren is sold into Daniel’s household to help her family survive. She becomes Daniel’s most trusted scribe, while taking lessons and swordsmanship training alongside Daniel’s sons and their best friend, Jared. But after a tragic accident changes the course of her life, Keren finds herself in a foreign country, charged with a mysterious task: teaching a shepherd boy how to become a lord. When she overhears whispers that hint at his true identity, she realizes she must protect him from the schemes of a bloodthirsty king.

In the search for the truth, the line between fact and fiction is beginning to fall out of focus It is 1903, and Lily Temple is a beautiful silent-film actress who spins fairy tales and plays frivolous roles in front of the cine-camera. But beneath the costumes and stage makeup is a woman with a quick wit, a murky past, and a tantalizing secret. As an underground investigator to the wealthy, Peter Driscoll has been tasked with locating the legendary Briarwood Teardrop, an exquisite sapphire that has been missing for years—and which Lily happens to be wearing beneath her gown.

Cassandra Hale grew up knowing little about her parentage, and she had made peace with the fact that she never would. But her world shifts when a shocking deathbed confession reveals a two-year-old letter from Mr. Clark, the master of Briarton Park, with hints to her family’s identity. Stung by betrayal, Cassandra travels to the village of Anston only to learn Mr. Clark has since passed away.