He is Belgian, Jewish, a Shoah survivor, a jeweller, a father, a husband, and the owner of the largest collection of antisemitic images in the world: Arthur Langerman. "The most hideous hate images are hanging in my home. It's my way of coping with the trauma of the Shoah," Langerman says, looking thoughtfully at his "most horrible picture" - a slyly grinning 19th-century "Jewish" umbrella dealer. In about 60 years he has gathered several thousand antisemitic objects. Where do the widespread stereotypes of Jews come from? What has led to the deep-seated hatred of Jews? And why do anti-Jewish stereotypes persist to this day, spreading hatred and harassment around the world? Arthur, the seeker, does not let these questions rest. In our documentary, he travels to various places to search for clues.