In Belgium's decadent but turbulent 1980s, a mysterious gang of criminals showed up out of the blue to commit a series of murders and violent robberies across the country. Dubbed the Brabant Killers by the press, (les Tueurs du Brabant in French, de Bende van Nijvel in Dutch), they killed 28 people, including children, and injured over 40. And then they abruptly disappeared. To this day, no members of the gang have been caught and convicted - or even identified. Their motives are also unknown, with the initial police investigation into the case widely criticised for being chaotic and careless.