Only four survived. The other 127 were dead when the Germans hastily buried their bodies. Antonio Ceseri, one of the four, could hardly breathe under the sand. Sebaldushof near Treuenbrietzen was one of 40,000 labour camps in Nazi Germany. "The Sandmine" is a journey deep into a forgotten part of German-Italian history. In six chapters and 24 episodes the web documentary employs a distinct mixture of animation and documentation to uncover war crimes that seemed long buried under the sand.