The Oath tracks the intertwined lives of Dr. Katz and SS Doktor Bloch, who both survive Auschwitz and the war to practice medicine in the United States, never losing the stains upon their souls. Katz, a respected Jewish French surgeon captured by the Nazis, volunteers to serve at Auschwitz, believing he can protect his wife and children from the gas chambers by helping Joseph Mengele and other SS physicians with their human studies. There he meets Tamara Lissner, a Czech teenager who mirac...