The urinal designed by Marcel Duchamp in 1917 represented an artistic revolution. Duchamp was considered as a genius. Filmmaker Barbara Visser portrays a certain baroness Elsa von Freytag-Loringhoven who, according to new research, was in fact behind the idea. With a sense of humour, Visser, a true specialist in what is real and what is fake, plunges us into this fascinating investigation.