Alfred Dreyfus, a French military officer, is wrongly convicted of treason for passing artillery secrets to the Germans. A trainee in the French Army's General Staff, he has only been accused because he is Jewish.
His case becomes known known as the Dreyfus Affair, and it will be both a sensation and a scandal in French society. Everyone takes a side: some defend Dreyfus and attack French anti-Semitism while others insist that Jews really are an enemy that cannot be trusted.
Dreyfus will eventually get a second trial where he is convicted again, but the French president will later pardon him.