After a commuter train collides with a Freight train, Naval intelligence officers find out that it was an act of domestic terrorism. Over the next seven years they uncover many such acts by the same group. Finally, one of the terrorists makes a mistake which takes down the nationwide network. The story comes to a climax as Naval intelligence officers race with time to stop a terrorist form bombing an Amtrak train containing 350 passengers including a senator, a general, a millionaire, and their wives