Two years after the Apollo 17 mission, three American astronauts are sent on a secret Department of Defense mission to the moon to place an early warning detector on the Moon for ICBM attacks from the USSR. What they capture on this top-secret mission is footage that NASA denies as authentic, but which hints at a sinister reason we've never gone back to the moon. The footage reveals an eerie and tense sequence of events as the astronauts encounter strange occurrences - equipment failure, unsettling noises, and disturbing alien tracks - that threaten their sanity and survival.