Shortly after the end of the Second World War, Josef Mengele, the Nazi doctor who had practiced in the Auschwitz extermination camp, managed to escape from Germany. With the help of SS soldiers and the support of wealthy South American families, he went into hiding in Argentina. From Buenos Aires to Paraguay, with stops in the Brazilian jungle, the so-called Angel of Death organized his methodical disappearance and escaped any form of trial.
It is the late 1950s. Flourishing under the economic miracle, Germany grows increasingly apathetic about confronting the horrors of its recent past. Nevertheless, Fritz Bauer doggedly devotes his energies to bringing the Third Reich to justice. One day Bauer receives a letter from Argentina, written by a man who is certain that his daughter is dating the son of Adolph Eichmann. Excited by the promising lead, and mistrustful of a corrupt judiciary system where Nazis still lurk, Bauer journeys to Jerusalem to seek alliance with Mossad, the Israeli secret service. To do so is treason — yet committing treason is the only way Bauer can serve his country.