When a worker is found murdered on the construction side, the investigation swiftly turns from things criminal to the political circumstances surrounding the building itself. Widespread corruption and neglect by the builder himself are seen to have brought the situation about. Much of the movie is filmed using hand-held cameras, and the majority of the dialogue is in the difficult-to-understand and very slangy Spanish dialect of Mexico City's bricklayers.
In a whorehouse in Acapulco, lives Leonor, a young and beautiful woman who is awaiting to reunite with an old lover. Suddenly, the man reappears to take her away from her life of vice. But the debt owed by Leonor to the "Madame" of the house causes a series of conflicts.
Blue Demon and pals square off against the Black Hand's army of super powered midgets. Five luchadores (Blue Demon, Mil Mascaras, El Medico Asesino, La Sombra Vengadora, Tinieblas plus Black Shadow) face off against a mad scientist and his army of powerful wrestling midgets.