As the dreams of Didier Mathure, a brilliant space engineer, literally go up in smoke when his rocket explodes on take-off, he is transferred to head GEPAN, a unit specializing in UFOs. He is tasked with coming up with scientific explanations for the UFO sightings that are currently dominating the headlines. This is a nightmare job for a die-hard rationalist like him, and he is determined to find a way out as soon as he can.

In the early morning of February 3, 1979, a giant black triangular object flew over Soesterberg Air Base. At least twelve soldiers witnessed this bizarre spectacle.

The film explore the British Royal family's interest in UFOs and the paranormal from the days of Lord Louis Mountbatten, Prince Philip and now King Charles. It also explores the claims that Charles flew a UFO back in 1975 in Canada