In 1990, the Voyager 1 spacecraft turns its camera back toward Earth from roughly four billion miles away and captures a single pixel of pale light, the image Carl Sagan calls the Pale Blue Dot. This film sets that photograph against Sagan's own narration, read over footage of the cosmos and archival images of human history, as he argues that every war, empire, and atrocity in our past has played out on that one mote of dust. He lists the constant stream of people who lived and died on it: kings and peasants, saints and tyrants, every civilization that ever rose or fell, all confined to a fraction of a single pixel. Ann Druyan's companion passage follows, proposing an experiment: stare at the dot and try to believe the universe was built for one species, one gender, or one creed on it. The film's case rests on scale rather than argument, using the image itself to make claims of human importance and divine favoritism look absurd, and closing on Sagan's line that the dot is the only home we've ever known.