When Nazi Germany troops enter Krakow, Poland on September 2, 1939, fourteen-year-old Simon Baron learns two truths that have been hidden from him. One, the people who have raised him are not his biological parents. Two, his birth mother was Jewish. In the eyes of the Germans, despite the fact he has been raised Catholic, this makes Simon Jewish.

Simon's dreams of becoming a concert violinist and composer are dashed when his school is forced to expel him, and he is no longer eligible to represent it at its annual Poland Independence Day Concert. There he had hoped to draw the attention of representatives of a prestigious contest who might have helped him fulfill his dreams.

Simon vows to never forgive his birth father for abandoning him, an act resulting in unspeakable tragedies for his family and in his being forced to live the indignities of the ghetto and the horrors of Auschwitz and Sachsenhausen concentration camps. Throughout his ordeals Simon waivers between his intense anger toward his birth father and his dreams of being reunited with him. Through his relationships with Rabbi Rosenschtein and the rabbi's daughter, Rachel, Simon comes to appreciate his Jewish heritage and find purpose in his life. Driven by devotion to family and friends and his passion for music, Simon holds on to hope. But can he survive the atrocities of the Nazi regime?