Based on

Movies like Des Teufels ruß'ger Gesell (1963)

A soldier returns from the war. As he has nowhere to stay, he moves to hell. There he is ordered by the devil to stoke the fire under the cauldrons and add coals. When he looks into the cauldron, he sees his captain, the marshal and the king sitting in it. They beg the soldier to help them to freedom. But the soldier remembers what these three had done to him on earth and seals the cauldron so tightly that the captain, marshal and king can never return. Now the soldier returns to earth reassured.