FBI cryptographer Eloise Marshall is grieving the death of her brother, who died during the attack on Pearl Harbor, when she is assigned to investigate a seemingly innocent letter about dolls. Agent Phillip Clayton is ready to enlist and head oversees when asked to work one more FBI job. A case of coded defense coordinates related to dolls should be easy, but not so when the Japanese Consulate gets involved, hearts get entangled, and Phillip goes missing. Can Eloise risk loving and losing again? 

After her father is murdered by Nazis and her mother flees to her native Germany, hope is something of which Nadia Roenne feels little—even if it is the meaning of her name. It isn’t until an American photographer sacrifices his escape from Poland to save a Jewish family, that she finds a purpose. David Reid is very familiar with failure, but when he is charged with getting Nadia safely out of Poland, he is determined to succeed—even if she works against him at every turn, putting other’s lives ahead of her own.

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.

Everything changes when Lilou is given her most important task: to keep a frightened little boy, Eliot, hidden safe in her farmhouse. All alone in the world, Eliot refuses to speak as he clutches his treasured children’s book close to his chest. Inside is a beautiful story of stars, planets and the night sky. But why is this innocent child the one, among thousands, who Lilou must save?

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. 

1941, Poland. Though war rages around her and occupying German forces march steadily onward, 16-year-old Aleksandra has lived her life sheltered from danger. Until one day, she goes to school—never to return. Pushed roughly into a truck with other schoolgirls like her, a single ominous word tells her all she needs to know about her fate: Lebensborn.

With a fake name written on the papers in her pocket, American photographer Clarisse Alarie knows the dangers of Paris better than most. Haunted by the sight of children being dragged away and carrying a photograph of the brown-eyed little girl everywhere she goes, Clarisse is desperate to make a difference. Soon, Clarisse is risking her life every day. Taking photographs of the terror that has overcome the beautiful city, Clarisse follows members of the Gestapo and hides in plain sight in order to gather evidence of their terrible crimes.

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.

Never pretty enough to please her gorgeous mother, Allie will do anything to gain her approval - even marry a man she doesn't love. Lt. Walter Novak - fearless in the cockpit but hopeless with women - takes his last furlough at home in California before being shipped overseas. Walt and Allie meet at a wedding and their love of music draws them together, prompting them to begin a correspondence that will change their lives. As letters fly between Walt's muddy bomber base in England and Allie's mansion in an orange grove, their friendship binds them together. 

Rhoda Middleton suspects her husband Peter is having an affair. But when Rhoda tracks the mysterious woman down, she finds she is not his lover after all, but the wife of his wartime best friend, Archie Foster. There is only one problem - Rhoda has never even heard of Archie Foster.

London, 1933. At first glance, Austrian opera singer Elsa Mayer-Braun has little in common with the young English typist she encounters on tour. Yet she and Hattie Featherstone forge an instant connection—and strike a dangerous alliance. Using their friendship as a cover, they form a secret society with a daring goal: to rescue as many Jews as possible from Nazi persecution. Though the war’s outbreak threatens Elsa and Hattie’s network, their efforts attract the covert attention of the British government, offering more opportunities to thwart the Germans.

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.

Vibrant and scrappy Maggie McCleod tried not to get fired from her wartime orchestra, but her sharp tongue landed her in trouble, so an overseas adventure with the USO’s camp show promises a chance at a fresh start. Wealthy and elegant Catherine Duquette signs with the USO to leave behind her restrictive life of privilege and to uncover the truth behind the disappearance of the handsome pilot whose letters mysteriously stopped arriving. The two women are joined by an eclectic group of performers.

Libraries are being ransacked. France is torn apart by war. A French librarian is determined to resist. Told through smuggled letters to an author, an ordinary librarian describes the brutal Nazi occupation of her small coastal village and the extraordinary measures she takes to fight back.

Paris, 1941. With Nazi occupation imminent, journalist Elodie Mitchell plans to return home to Chicago. But an unexpected invitation to a Josephine Baker show changes everything. Mistaken for the star, Elodie is whisked backstage, where she uncovers an underground resistance movement hidden beneath the glitz and glamour. Drawn into a whisper network of spies, Elodie accepts a perilous mission: to go undercover as Josephine's cousin and gather vital intelligence.