The Second World War. The Nazis suffer one crushing defeat after another. As a result of the study of occult rituals in a super secret laboratory, scientists working for the fascist regime succeed in raising the Demon of Hell from oblivion, which should help turn the tide of the war.

But a detachment of allies secretly enters the science lab and turns this mystical and formidable weapon against the Nazis. However, none of the participants in the experiment suggests that the gates of the other world after opening will prove to be beyond human control, and they will have to face creatures even more dangerous and unpredictable than the Demon of Hell.