David Vincent goes to the authorities to report a UFO and an alien invasion but nobody believes him.
A well known astrophysicist, Curtis Lindstrom, is about to make public than an alien invasion is occurring. However, the aliens are plotting to kill the man before he makes his information public.
A man named Warren Doneghan, president of Jet Age Electronics asks Vincent's help in tracking down a couple of scientists that have been kidnapped by aliens. He also reveals that he himself is a target.
A police officer is attacked by alien so Vincent decides to investigate and see what he knows.
Just before he died, a repairman gives an account of seeing alien activity at Vikor Enterprises. Vincent comes into investigate the area.
David tries to unravel the mystery of a metal cylinder found at the site of a plane crash
David and the invaders pursue a fisherman who found an alien weapon---proof of invasion from outer space.
Vincent finds out about Midlands Academy, a fake academy, that is really serving as a training institution for the aliens.
Vincent has another encounter with a UFO in an oil field. He finds a special tape which may provide details of the alien's plans for Earth.
An alien, bitten by a rattlesnake, begins to burn up in front of a startled young girl who believes she has a religious vision.