In January 1914, a horrible murder shook up the city of Budapest. One of the most famous courtisanes in town, Elza Mágnás was strangled and her body was thrown into the icy water of the Danube. “Demimonde” chronicles the last four days of Elza, her complex relationship with her housekeeper, her sponsor and her lover, through the eyes of a young and naive maid. Based on a true story about love, passion, sex, power and murder.