Johnny Price was a high-ranking officer in the  military and a decorated war hero; but after  being convicted of a crime he didn't commit, he  was dishonorably discharged and has never  been able to live down the disgrace. When a  band of terrorists seize Hoover Dam and  threaten to blow it up if their demands are not  met, Price is called in and given a shot at  redemption as the only man who can fend off  the invaders and prevent a disaster that could  cost thousands of lives