Nuclear weapons experts and former officials lay out why the Bulletin of the Atomic Scientists moved its Doomsday Clock to two and a half minutes to midnight, the closest it had been to catastrophe since the early Cold War. Former Defense Secretary William Perry appears throughout, drawing on his own history inside the nuclear chain of command to explain how close the world has come to accidental war, including a 1979 false alarm that nearly triggered a US response before anyone confirmed it was a computer glitch. The film moves through the expanding list of nuclear states, the fraying of arms control treaties, and the specific dangers posed by aging Cold War arsenals still on hair-trigger alert. Archival footage of test detonations and command bunkers sits alongside present-day interviews, building a case that the risk of nuclear war has grown rather than receded since 1991. It ends without reassurance, treating the clock itself as the film's argument: an expert consensus that the world is not as safe as it feels.