After a shuttle explosion in space and a meteor shower in New York, a retired navy officer the size of Texas (played by itself) on a collision course with Earth. It will wipe out everything living including bacteroid, plant a nuke in it, and blow it away.
To do the job, NASA administrator Dan Truman (Billy Bob THornton) cells upon the best deep core driller in the world, Happy Stamper (Bruce Willis). With only 18 days to destrong the asteroid, it's a race against time to save all creation and prevent Armageddon.