Without warning, an asteroid slams into the Atlantic Ocean off the coast of Brazil, spawning a tsunami several hundred feet high. Minutes later, the tsunami slams into Rio de Janeiro before any tsunami warning can be given. In only a few minutes, the city that had stood nearly 500 years as the jewel of South America is completely submerged; there are almost no survivors. Similar destruction occurs up and down the Brazilian coastline, with the deaths of almost 3,000,000 lives.
In the aftermath of the tragedy, several noted astronomers are ordered to investigate why the asteroid got through without any warning at all. During their investigation, more meteors strike worldwide, causing major devastation.
One hits a shopping mall in Chicago.
One strikes the ferris wheel in Yokohama, Japan's Yamashita Park.
One explodes in the skies several miles above Cairo, creating a Tunguska-sized blast that levels most of the city.
As panic ensues worldwide, the astronomers discover that an asteroid almost 13 miles wide is heading for Earth and there might not be any way to stop it.
The UN unveils a top-secret asteroid defense weapon that may work to deflect the asteroid, but, unlike other disaster movies, the weapon does not work and the asteroid is going to strike Earth, in central Africa.
As meteor impacts increase and mass hysteria reigns worldwide, the astronomers and their families gain access to a deep-underground bunker stocked with everything needed for long-term survival.
The film ends with the astronomers and their families sitting in the bunker as the asteroid collides.
Matt McCoy as Dr. Bruce Mann
Crystal Lowe as Stacey Mann
Yancy Butler as Dr. Connie Walsh