A long lost NASA space probe mysterious crash lands in New York City, apparently under the influence of a dark energy force that drives the universe's expansion. But the scientific curiosity soon becomes a disaster of cataclysmic proportions as Earth's own gravity is disrupted and eventually reversed, causing skyscrapers and bridges to be ripped from the ground and rivers to rain from the sky. A team led by the Office of Emergency Management supervisor is forced to mount a desperate mission into upside-down Manhattan to avert the entire planet's destruction.
