Jack Wallach is the head of FEMA. When Dr. Lily McKee, an astrophysicist, discovers an asteroid on a collision course for Earth, she, Jack and his team begin the hard task of preparing for the worst. An attempt to deflect the asteroid by destroying it fails leaving several smaller asteroids heading for Earth. The largest hits Dallas, Texas, while the smaller fragments cause devastation to Kansas City and Denver.
Lily's son, Elliot, is with his grandfather in Dallas when the asteroid hits. Jack takes it upon himself to help search through the destruction for one small boy, finds him and saves him.