In the snowbound city of Kiev, aspiring historian Mila Pavlichenko’s life revolves around her young son - until Hitler’s invasion of Russia changes everything. Suddenly, she and her friends must take up arms to save their country from the Führer’s destruction. Handed a rifle, Mila discovers a gift - and months of blood, sweat and tears turn the young woman into a deadly sniper: the most lethal hunter of Nazis. Yet success is bittersweet. Mila is torn from the battlefields of the Eastern Front and sent to America while the war still rages. There, she finds an unexpected ally.

In the chaotic aftermath of World War II, American college girl Charlie St. Clair is pregnant, unmarried, and on the verge of being thrown out of her very proper family. She's also nursing a desperate hope that her beloved cousin Rose, who disappeared in Nazi-occupied France during the war, might still be alive.

Three very different women are recruited to the mysterious Bletchley Park, where the best minds in Britain train to break German military codes. Vivacious debutante Osla has the dashing Prince Philip of Greece sending her roses - but she burns to prove herself as more than a society girl, working to translate decoded enemy secrets. Self-made Mab masters the legendary codebreaking machines as she conceals old wounds and the poverty of her East-End London upbringing. And shy local girl Beth is the outsider who trains as one of the Park’s few female cryptanalysts.

Rome, 1492: The Holy City is drenched with blood and teeming with secrets. A pope lies dying and the throne of God is left vacant, a prize awarded only to the most virtuous - or the most ruthless. The Borgia family begins its legendary rise, chronicled by an innocent girl who finds herself drawn into their dangerous web.... Vivacious Giulia Farnese has floor-length golden hair and the world at her feet: beauty, wealth, and a handsome young husband. But she is stunned to discover that her glittering marriage is a sham.

In 1936 Nancy Wake is a foreign correspondent in Paris who witnesses firsthand the terror of Hitler's rise in Europe. When Nancy falls in love with handsome French industrialist and playboy Henri Fiocca, no sooner has she agreed to marry him than the Germans invade France and Nancy takes on her first code name.

In the small French town of Colmar, swastikas hang from lampposts, tanks are lined up outside the town hall, and 21-year-old Marie-Claire is in love. She will do anything for her childhood friend Jacques, including spying on her German boss, Dietrich Kurtz. Anything to make Jacques see her in a new light, as something more than just a silly little girl. But when Jacques rejects her, everything changes. Mortified and stung, Marie-Claire feels the need for revenge. She turns her back on those she loves and is catapulted into a new life. 

A door slammed and the unmistakable sound of boots came crashing up the hall. Liese held her little daughter’s hand so tightly, the tiny fingers had turned purple. The SS officer’s hand was at Liese’s throat before she saw him move. "I can kill you easily, then I can kill your daughter." He relaxed his grip a little. "Or perhaps I could kill her first?" England, 40 years later. When Karen Cartwright is unexpectedly called home to nurse her ailing father, she goes with a heavy heart. 

In England, 1939, talented pilot Skye Penrose is flying for the Royal Air Force. She soon meets a mysterious Frenchwoman named Margaux Jourdan, and with her is Catherine Dior, the sister of the renowned designer. Together, they have no idea of the danger that lies ahead.... 

1940, Jersey. When Nazi forces occupy Jersey in the English Channel Islands, Céline Huber, who is married to a German, must decide where her loyalty lies. Love for her island and fear for her Jewish friend Rachel soon propel her into a dangerous double life. Meanwhile, Céline’s husband Fred is conscripted into the Wehrmacht in occupied France. Horrified by Nazi acts of atrocity and torture, he soon becomes a double agent for the French Resistance.

In 1942, Eva is forced to flee Paris after the arrest of her father, a Polish Jew. Finding refuge in a small mountain town, she begins forging identity documents for Jewish children escaping to neutral Switzerland. But erasing people comes with a price, and along with a mysterious, handsome forger named Rémy, Eva realises she must find a way to preserve the real names of the children who are too young to remember their own identities. 

Berlin, 1938: it’s the height of summer, and Germany is on the brink of war. When fledgling reporter Georgie Young is posted to Berlin, alongside fellow Londoner Max Spender, she knows they are entering the eye of the storm. Arriving to a city swathed in red flags and crawling with Nazis, Georgie feels helpless, witnessing innocent people being torn from their homes. As tensions rise, she realises she and Max have to act - even if it means putting their lives on the line. 

Lisbon, 1943. After escaping from Nazi-Occupied France, SOE agent Elisabeth de Mornay, codename Cecile, receives new orders: she must infiltrate high society in neutral Lisbon and find out who is leaking key information to the Germans about British troop movements. As Solange Verin, a French widow of independent means, she will be able to meet all the rich Europeans who have gathered in Lisbon to wait out the war. One of them is a traitor, and she must find out who before more British servicemen die. 

An unknown location, occupied France, 1944. Dropping silently behind enemy lines, Sylvia Crichton, codename Monique, is determined to fight for the country of her birth and tear it from its Nazi stranglehold. As one of the dancers at the nightclub Mirabelle, Sylvie’s mission is to entertain the club’s German clientele and learn their secrets. In a world of deception and lies, she can trust no one. 

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. 

Audrey Coltrane has always wanted to fly. It is why she implored her father to teach her at the little airfield back home in Texas. It is why she signed up to train military pilots in Hawaii when the war in Europe began. And it is why she insists she is not interested in any dream-derailing romantic involvements, even with the disarming Lieutenant James Hart, who fast becomes a friend as dear as the women she flies with. Then one fateful day, she gets caught in the air over Pearl Harbour just as the bombs begin to fall, and suddenly, nowhere feels safe.