Aztec Massacre he rushed back to the Aztec capital of Tenochtitlan (modern-day Mexico City) to put down a native uprising. The findings at Zultepec, plus evidence in ancient documents (Aztec codices depicting ritualistic displays of human sacrifice), show that the abandoned Spanish were captured and offered to the Aztec gods, along with natives from local tribes who were helping the Spanish against their Aztec masters. The Aztecs practiced human sacrifice and the documentary narrates how Cortés wrote about how the victim's chest was opened while they were alive and their still beating heart offered as sacrifices. Cannibalism followed. The film indicates that,
The Robot vs. The Aztec Mummy in the production schedule. The evil Dr. Krupp (Luis Aceves Castañeda), a mad scientist known as "The Bat", managed to escape the snake pit into which he was thrown at the end of "The Curse of the Aztec Mummy" and continues his efforts in this film to steal a valuable Aztec treasure from the tomb of a centuries-old living mummy, Popoca (Angel di Stefani). Krupp builds a robot with a human brain in it, planning to use it to destroy the mummy, should he return to thwart his efforts. Krupp's former colleague and original finder of the mummy, Dr. Eduardo