January 1944—a senior member of the French Resistance betrays his comrades to the Abwehr and Gestapo, but who? Within hours, the Germans arrest hundreds of suspected resistance fighters and incarcerate them in the infamous Amiens prison. When a Resistance spy inside the prison informs his leaders, Dominique Ponchardier and Boniface Monier, of German plans to conduct mass executions within weeks, they are helpless to respond. In a last-ditch effort to free their Résistants awaiting death or deportation to labor camps, they turn to the British for help.

Dieter Vogel, a German industrialist, believes in protecting his family at all costs, but in a bid to keep his English wife and children safe, he is plunged into a well of deceit that tears the family apart. Doctor Paul Vogel is coerced into working in the Nazi eugenics program and soon discovers that sterilizing handicapped and mentally-ill Germans is just a prelude to a more lethal plan against those the Reich deem unworthy of life. Paul, trapped by the SS, seeks help from the unlikeliest of people and is plunged into a world of espionage and murder.

Brinley Knight has a photographic memory. Bored with his mundane job, he accepts an offer from MI5 to become a full-time spy in a shadowy world of espionage. As Britain stands at the edge of war, Brin learns to his cost that "defending the realm" means duty before family. Hitler’s fifth columnists in Britain emerge from the darkness as Germany’s military might eyes new territories east of the Rhine. German spies and fascists operate in opulent dining rooms and in the back alleys of London’s East End. Menacing predators, they hunt for information that could aid the Führer.

An Irish Easter uprising lays waste to Dublin and fractures a British Empire struggling to supply men and arms to defeat Germany. In Dublin’s ruins, the affluent Carmody family is not only forced to confront the rebellion’s devastating effects on its personal lives, but also the terrible secrets and lies uncovered in the midst of grief. Jenny, self-entitled and strong-willed, sees her wedding plans and grand ambitions disintegrate. She faces a dismal life in one of London’s munitions factories - until a cataclysmic event changes her life and perception of love forever.

As Normandy grows in power and stature, so too does its young duke, William of Normandy. Since childhood, he has been forced to run, hide, and endure the threat of assassination from powerful nobles who seek to overthrow him. After his guardians and tutors are murdered, one after the other, he begins to take revenge on his treacherous family members and their allies and gain control of a divided region.