MUFON - the Mutual UFO Network - investigate a UFO sighting, and possible alien abduction, using the tools of science, psychology and law enforcement.

MUFON struggles to separate fact from fiction as they travel to three cities in Mexico. Analysis of UFO photos and videos brings them face-to-face with potential fraud, half-truths and cover-ups.

When the number of UFO sightings increases by 700%, MUFON investigators converge on the Philadelphia suburb of Bucks County. The team works their way through nearly 60 witnesses to focus on two, in hopes their stories can be verified by physical evidence.