Sixty-six million years ago an asteroid ended the age of dinosaurs, and this film asks whether civilization would fare any better if the sky produced a repeat. It follows the astronomers and engineers at near-Earth object tracking programs who scan for the next city-killer rock, explaining how little warning time current systems would actually give. From there the film turns to the ground, touring multi-million-dollar survival bunkers built for wealthy clients preparing for pandemics, nuclear war, or impact winters, complete with underground living quarters and independent power and food systems. Interviews with planetary defense specialists and bunker engineers lay out two very different responses to the same fear: stopping the disaster before it happens versus outlasting it after it does. The film moves between control rooms tracking asteroid orbits and construction sites carving shelters into mountainsides, building a picture of how seriously, and how unevenly, humanity is preparing for the kind of event that has already wiped out most of the species that ever lived.