From 1947 to 1969, the U.S. Air Force carried out a systematic study of unidentified flying object (UFO) sightings, codenamed “Project Blue Book.” Thousands of reports from American and European citizens were recorded during those years; more than 700 cases remained “unidentified.” The film reuses original documents from the now-declassified project, superimposing them over family footage from the same period. In the encounter between the domestic and the scientific, the familiar and the alien, a hidden portrait emerges of a nation haunted by its own astronomical obsessions.