On the night of February 27, 1933, Germany's parliament building burns, and within weeks Hitler has emergency powers that end the Weimar Republic. This film examines who actually set the fire, laying out the competing suspects: Marinus van der Lubbe, the Dutch drifter caught alone inside and executed for the crime; the German Communist Party, blamed en masse by Nazi propaganda; and the Nazis themselves, accused by critics of stage-managing the blaze to justify a crackdown. Historians walk through the physical evidence from the scene, the flawed Leipzig trial that followed, and the decades of later investigations and forensic reassessments that have never produced a settled verdict. Archival photographs, newsreel footage, and courtroom records trace how quickly the fire was turned into a pretext for banning opposition parties and jailing communists. Ninety years on, the film treats the arson question as still genuinely open, using it to show how a single unresolved night became the hinge on which German democracy collapsed into dictatorship.