On the Austrian banks of the river Danube, lies the picturesque town of Mauthausen. Tour guides come to work here every day while nearby, the locals go about their daily lives. This is the home of the former KZ, short for concentration camp in German, where thousands of people were tortured and murdered. How does it feel to be a tourist at a former concentration camp? How does it feel to work here as a guide, day in, day out? How does it feel to live here as a local with the dark secrets of the past? KZ, a groundbreaking film about facing our ultimate demons, will shake you to the core.