Mil Mascaras is a renaissance man of international repute. He is a connoisseur of the arts, a scholar of science and humanity, and a masked wrestler. Like his fellow luchadores, El Santo and Blue Demon, Mil Mascaras is often called upon to assist the authorities in combating threats to mankind, whether they are seductive vampire women, lycanthropic madmen, or invaders from other worlds. However, no threat has ever been greater than that posed by the Aztec mummy. In this story, the Aztec mummy is resurrected by the power of the gem of Tonauac. Using its power, the Aztec mummy is able to control the minds of men, even those of strong pedigree and erudition. Determined to lead the ascendancy of the Aztec nation over the descendants of its past conquerors, the Aztec mummy conspires to manipulate men of power for his own ends. Whether Mil Mascaras can be corrupted by the influence of his undead adversary is not clear, but the answer hinges upon the secret of his mask -- a mask which has been passed down to him from his ancestors since time in memoriam.