A professor of archeology sets out on a mission to identify an ancient Mesoamerican ruin and a mysterious anomaly that lies beneath it. The workers she hires to excavate the ruin flee, claiming there are malevolent forces at work. Thinking that they are just superstitious, she and her team disregard the warning and continue to explore the peculiar metallic structure. What starts out as an archeological dig turns into a maelstrom of death and destruction.