Berlin, 1933. The skies are burning bright with huge bonfires of banned books. The Nazi party is swelling in number and 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 is surprised to come across a prewar German diary among her Grandpa's things and shocked by what she finds. So begins a journey that will take Maddie beyond America as she searches for the truth about Freya and how she changed people's lives across the globe.