March 1945. It is already quite obvious to the Nazis that they cannot win the war. So it is time to think about the future after the war and to cover their tracks. One concentration camp must be completely cleared out and the prisoners buried in the mines. Only the mine-hunters remain - among them Ernest, a veteran of the Spanish Civil War from Vienna, and Kim, a resistance fighter from Prague. One day they decide to escape with the other prisoners, but they are betrayed and most of the escapees...