No one knows his real name; he is known only as Mr. Shoshani. A brilliant, homeless wanderer, he captivated some of the 20th century’s greatest Jewish thinkers—including Elie Wiesel and Emmanuel Levinas—with his astonishing mastery of Torah, Talmud, philosophy, mathematics, and science. Blending detective story with spiritual inquiry, this fascinating documentary travels across the globe in search of clues to the true identity of one of the most enigmatic figures in modern Jewish intellectual history.