Terrorists hijack a 747 inbound to Washington D.C., demanding the release of their imprisoned leader. Intelligence expert David Grant (Kurt Russell) suspects another reason and he is soon the reluctant member of a special assault team that is assigned to intercept the plane and hijackers.

U.S. Marshal Sam Gerard is accompanying a plane load of convicts from Chicago to New York. The plane crashes spectacularly, and Mark Sheridan escapes. But when Diplomatic Security Agent John Royce is assigned to help Gerard recapture Sheridan, it becomes clear that Sheridan is more than just another murderer.