A look at Saul Auslander, a Hungarian member of the Sonderkommando, the group of Jewish prisoners isolated from Auschwitz in 1944 who were forced to assist the Nazis by cremating the bodies of the dead. Saul discovers the corpse of a boy he believes is his young son. As the other Sonderkommando plan a rebellion, Saul decides to carry out an impossible task: find a rabbi to recite the mourner's Kaddish and offer the boy a proper burial.