Dirk (Matthew McConaughey) and Al (Steve Zahn) have been friends since kindergarten, having also gone through college and the Navy together. The two now work for a former admiral traveling around the world and salvaging treasures from the sea with the National Underwater and Marine Agency (NUMA).
When a train carrying atomic warheads mysteriously crashes in the former Soviet Union, U.S. nuclear specialist Dr. Julia Kelly discovers that the accident is really part of a diabolical plot to cover up the theft of the weapons. In a race against time, crack special forces Colonel Thomas Devoe and Dr. Kelly team up, putting aside their personal d differences as they track the last remaining warhead to the steps of the United Nations.
Ben Affleck stars as Michael Jennings, a brilliant computer engineer hired by high-tech corporations for specialized top-secret projects. Once a job is complete, Jennings routinely has his short-term memory erased so as not to divulge any sensitive company information to future clients