It is September 1, 1939 when Germany invades Poland and transforms eight-year-old Casimir Bieberstein's world forever. The son of a wealthy Jewish businessman, Cass happily lives in a thirty-room mansion. But when his family is forcibly ejected from their opulent and luxurious existence, Cass is immersed in a dark life he never could have envisioned in his wildest dreams.

After moving from one apartment to the next, Cass and his family are eventually forced into the Jewish ghetto in Warsaw nearly three years later. Cass, who is seeking justice and the neutralization of Arturo,...