Artist Trevor Paglen talks through his method of photographing what governments would rather keep hidden: CIA black sites, NSA facilities, and classified satellites orbiting overhead. He explains how he uses modified telescopic lenses, the same technology astronomers use to photograph distant galaxies, to capture blurry, long-range images of military installations in the Nevada desert and elsewhere. Paglen discusses tracking secret satellites by their orbital patterns and photographing them against the night sky, turning publicly available orbital data into an image nobody was meant to take. The film shows him in his studio and in the field, describing why he treats the limit of visibility itself as his subject rather than any single site. His work sits at the intersection of documentary evidence and conceptual art, and the film lets him make the case for why an out-of-focus photograph of a distant building can still count as proof that something is there.