Berlin, 1933. The night skies are burning bright with huge bonfires of banned books. The Nazi party is swelling in number, Berlin is no longer a safe place for young Freya. She can only watch on, horrified, as her beloved city falls to fascism – and the usually law-abiding Freya is forced to make a choice: continue being a bystander, or sacrifice herself to save the lives of others. New York, present day. Maddie commutes home to her family to reset. Struggling to fully turn off from her work, she’s is shocked to come across a pre-war German diary amongst her Grandpa’s things.

As Allied bombs rain down on Torino in the autumn of 1942, Stella Costa’s mother sends her to safety with distant relatives in a Tuscan villa. There, Stella finds her family tasked with a great responsibility: hiding nearly 300 priceless masterpieces from Florence, including Botticelli’s famous Primavera. With the arrival of German troops imminent, Stella finds herself a stranger in her family’s villa and she struggles to understand why her aunt doesn’t like her. She knows it has something to do with her parents.

England: 1944. When psychologist Maddie Gresham is sent a mysterious message telling her to report to Trent Park mansion, she wonders how she will be helping the war effort from a stately home. Having signed the official secrets act, she soon finds captured Nazi generals are being detained at the house. Bugged with listening devices in every room, it’s up to Maddie to gain the Nazis’ trust and coax them into giving up information. When Max Weitzler, a Jewish refugee, also arrives at Trent Park with the same mission, Maddie finds herself trapped in a dangerous game of chess.

Tuscany, 1942: having moved from England to the beautiful city of Lucca before the outbreak of war, Lizzie Thornton adores her job as tutor to eight-year-old Cristo – despite the fact that his father, Count Antonio de Falco, is a notable fascist and supporter of Mussolini. Then war is declared, and Lizzie is suddenly regarded as an enemy in the country she loves so much. When new tutor Vincenzo Baldini arrives, Lizzie is exposed to a new secret world; Vincenzo is actually a member of the Italian resistance, running an anti-fascist propaganda magazine.

April 1941: Belfast has escaped the worst of the Second World War—so far. Over the next two months, it will be so destroyed from above that people will say, in horror, “My God, Belfast is finished.” Many won’t make it through, and those who do will be forever changed. Living amid the rubble are sisters Emma and Audrey. One is engaged to be married; the other is in a secret relationship with another woman.