Journalist Mike Harway decides to help his friend Christine in her search for her father, professor Baker, mysteriously disappeared. The investigation brings them to Africa, where as they're traversing a deserted are they're captured and brought to the El Faium abandoned fort. It now hosts a laboratory designed by the twisted mind of Devilman, who dreams of swapping his natural brain with an artificial one that will make him perfect. Very soon prof. Baker will have to proceed with the transplant, after experimenting the procedure on his daughter. Devilman's long-standing henchman Kun however discovers that the transplant success will also mean his downfall, so he allows Mike to escape with the promise that he'll be back with reinforcements. The journalist finds a Tuareg tribe willing to help him. As the Tuareg warriors engage Devilman's guards in combat, Mike attacks the villain, who perishes crashing into the machine he himself built.