Journalist Mike Harway decides to help his friend Christine in her search for her father, professor Baker, who mysteriously disappeared. The investigation brings them to Africa where they are 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.

Anthony Steffen, as a young gunman who works as a circus performer, witnesses the killing of some outlaws, carried out by their leader and is credited with the deed. Steffen suffers from a complex which blocks him in front of any violence and makes him appear cowardly, so when a young boy is kidnapped he must find a way to regain his composure.

Entre los EEUU y México se está traficando con armas cuyo destino es el movimiento rebelde, lo que puede derivar en un conflicto diplomático. El ejército estadounidense enviará al capitán Morrison.

Chamaco finds himself on the wrong end of a firing squad after tracking an ex-Confederate to interrogate him about General Beauregard's missing gold. He's saved by a stranger who calls himself Stuart Byrnes. Stuart claims to know the location of Beauregard's strongbox, and so Chamaco takes him to Blake's camp. After a sort of initiation by the gang, Stuart leads Blake's men back across the border to Durango to retrieve the gold.