In 1993, twelve-year-old Becca, who struggles with an anxiety disorder, visits her divorced father in Vienna, Austria, where she befriends a Muslim refugee fleeing the Bosnian genocide.
Maria and her friend Nathan flee their Nazi-occupied Ukrainian town, hoping to earn wages and avoid starvation as foreign workers in Austria, but they are quickly separated and Maria waits out the war as a farm laborer.
In eighteenth-century Vienna, Austria, fifteen-year-old Theresa seeks a way to help her mother and brother financially while investigating the murder of her father, a renowned violinist in Haydn's orchestra at the court of Prince Esterhazy, after his body is found near a gypsy camp.