Danny Dyer goes on a quest to spot a UFO, spurred on by a meeting with his boyhood hero Sir Patrick Moore. Danny examines reported UFO landing sites and the sinister evidence that aliens may have been conducting scientific experiments here in Britain. He meets witnesses who claim to have seen UFOs and one man who says he can prove he's been abducted by aliens. Danny's search for his own close encounter takes him all the way to the UFO Research Centre in Portland, Oregon.

One of several 1970s documentaries on the subject of unidentified flying objects (UFO), supporting the view that Earth is visited regularly by extra-terrestrial engines and aliens.