While being escorted to prison from Phoenix to New York, crazed killer Peter Cronin hijacks a commercial jet in flight with the help of accomplices. Holding the 200 passengers and the crew members hostage, Cronin forces the plane to land in Dallas. As FBI agents attempt to negotiate with Cronin, time runs perilously short for the hostages, who know that the killer isn't bluffing when he threatens to kill one prisoner per hour unless his demands are met. (ovguide.com)