Holding the faded postcard in her trembling hands, Mia begins to read the one story her grandmother could never tell her, revealing a secret that will change her own life forever....

When her beloved grandmother, Ilse, is taken into hospital, Mia drops everything to travel to Germany and care for the woman who raised her. But when her grandmother briefly wakes up and asks for a man called Szymon, Mia is confused. Who is he? And why does her grandmother need to see him so desperately?

Later that night, Mia returns to her grandmother’s apartment to search for clues. She soon discovers a small parcel hidden inside one of Ilse’s suitcases. When she removes the wrapping, she finds a stack of faded postcards neatly bound together, signed with a name that makes her heart stop in her chest: Szymon.

Desperate to find Szymon before it is too late, Mia unearths a story her grandmother never told her: of childhood friendship and heartbreaking young love on the eve of World War II, and of a plan to rescue a young man imprisoned by the Nazis. Mia can’t quite believe her grandmother was so brave, and risked so much to save this man’s life. But did she succeed?

As the final pieces of the past come together, Mia realizes that she is about to find out what really happened to her grandmother during the war. But she doesn’t expect to uncover a secret that will change everything....

Based on a true story, this emotional wartime novel follows one woman’s brave decision to save the man she loves from the Nazis. A binge-worthy and moving story about courage in the face of unimaginable odds, perfect for fans of The Tattooist of Auschwitz, The Nightingale, and The Alice Network.