In her latest film, young actress and documentary filmmaker Petra Nesvačilová decided to capture police officer Helena Káhnová, who, together with her colleague, managed to send dozens of people to prison in the Berdych gang case in the 1990s - including Berdych himself. The cumulative punishment was hundreds of years in prison - the policewoman received a reward of CZK 10,000 and a promotion, which was subsequently withdrawn. The director also managed to establish a film relationship with Berdych himself and former members of his gang. What motivates a policewoman to stand up to the mafia and what motivates a young documentary filmmaker to contact the mafia and make a film about it?