Markus Simmons, a 13-year-old 8th-grader, wants to hang with the cool kids. When his social studies class begins a Holocaust project, some A-listers befriend him to get him to work with them so they can have access to his Oma, who was in Auschwitz, and he discovers that there are Holocaust deniers in the world, one of whom is in his class. Then someone identifies his Oma as having played a criminal role during the Holocaust, and he has to reconcile his love for his grandmother, his desire to work with the cool kids, and his anger at the deniers and the others who attack his grandmother.