The Oath tracks the intertwined lives of Dr. Katz and SS Doktor Bloch, who either live on Auschwitz and the battle to perform medication within the usa, by no means wasting the stains upon their souls. Katz, a revered Jewish French doctor captured via the Nazis, volunteers to serve at Auschwitz, believing he can shield his spouse and youngsters from the fuel chambers by means of assisting Joseph Mengele and different SS physicians with their human stories. There he meets Tamara Lissner, a Czech teen who miraculously survives loss of life within the chambers, but if he hides her in his lab, she turns into witness to the scientific torture Katz is pressured to impose upon fellow Jews as he assists Doktor Bloch in his chilly immersion experiments. After the conflict, Doktor Bloch avoids felony prosecution via "Operation Paperclip," a clandestine govt application that welcomed German scientists to the USA (including Werner von Braun), ignoring Nazi ties and their participation within the war.

Years later, Tamara reenters Dr. Katz's existence, supporting him take care of the disgrace and guilt of his activities at Auschwitz. yet simply whilst Katz is coming to phrases along with his earlier, he gets a decision from former Auschwitz inmate Martin Brosky, who has dedicated his lifestyles to bringing painful retribution to Nazi criminals who've kept away from trap. Martin insists that Michel support him kill Bloch, and Michel needs to now weigh the hazards of defying Martin opposed to the wonder of revenge, understanding good that his personal sordid complicity at Auschwitz may be revealed.