In 1945, seven-year-old Barbie and her sister Eva were trapped, terrified, in wartorn Germany. With their father missing, and hundreds of miles from their mother, news of the approaching army left them confronted with an impossible choice: to face invasion, or to flee on foot. Eva, aged nineteen, was determined to find her mother. For Barbie, twelve years younger, the journey was to be more perilous but, spurred on by her sister's courage and her desperate desire to be reunited with her mother, she joined Eva on a journey no child should ever have to endure.