A crazed doctor performs gruesome experiments in his search for a youth serum.
Blue Demon returns in one of his best adventures like Agent Zero, who this time is facing a criminal organization that attempts to poison the world with a deadly gas (whose formula is unknown). This time, Zero (Blue Demon) is the only one qualified to investigate and prevent Hans plans, the evil leader of the organization.
Lopitos, who is horribly inefficient but quick-witted, is invited (because of the current ambassador's superstition about 13 sitting down to a meal) to a banquet attended by the ambassadors of both superpowers. After the news of a series of coups d'état in Los Cocos arrives throughout the meal, Lopitos becomes the official ambassador. At a summit of world leaders, the representatives of the two world superpowers court the allegiances of third-world diplomats to tilt the balance of global power in their favor. The last diplomat to remain unaligned, Lopitos instead harangues the superpowers for infringing on the rights of developing countries to self determination, talking to them with his point of view as a citizen not as ambassador because he arranged his demise as ambassador one day before his speech.
The disaffected wife of a failed civil servant, is thrilled to re-encounter Octavio, a former lover who is now a union activist on the run from a corrupt politician. Hoping to help him, she descends into the Mexican underworld, where she finds a purpose-and a thrill-missing from her married life.
In times of the French Intervention, a student of Nunó, author of the Mexican National Anthem, falls in love with the niece of the French Ambassador, which causes quite amusing complications.