Armed robber Dennis Hope is serving an 80-year sentence at the notorious Darrington Unit in Texas when he's caught up in a bloody prison riot. It's a brush with death which triggers his decision to risk escape. On the night of the escape, Hope and two accomplices sabotage the prison power system. Under cover of darkness they cut through the first prison fence and climb over the second. But that was the easy part: now they must get past the five mile search perimeter before they're caught.