In 1939 Sweden, two Jewish sisters wait in separate foster homes for their parents to join them in fleeing the Nazis in Austria, but while eight-year-old Nellie settles in quickly, twelve-year-old Stephie feels stranded at the end of the world, with a foster mother who is as cold and unforgiving as the island on which they live.

Nearly four years after leaving Vienna to escape the Nazis, Stephie Steiner, now sixteen, and her sister Nellie, eleven, are still living in Sweden, worrying about their parents and striving to succeed in school, and at odds with each other despite their mutual love.