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Radio astronomer Zane Ziminski (Charlie Sheen) becomes intrigued by some strange wavelengths and noises he picks up over his transmitter. But when Zane alerts his boss to his findings he's fired. So Zane conducts an investigation on his own tracing the sound waves to a Mexican village. After more sleuthing (and some odd occurrences) Zane discovers a power plant -- that turns out to be the headquarters of some very deadly extraterrestrials.