In the last weeks of the Third Reich, the Nazi regime goes about hiding their immense riches in the Alps. They've been planning an incredible last retreat in the region between the Comer Lake and Wiener Neustadt, including gigantic building projects and underground factories. But was this ‘Alpine Fortress' an elaborate bluff or a serious plan? And what happened to the hidden Nazi treasure? Even today, treasure-hunters and fortune-seekers comb the area in the hope of finding something. We follow the trail of these old mysteries and uncover what happened in the turbulent last days of the Third Reich.