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In a classic tale of torn loyalties, the movie tracks the tale of two friends from West Point, who are now officers on opposing sides in the Civil War. Major Clay Clayton has been charged with delaying General Sherman's advance on Atlanta. To accomplish this, he takes a group of volunteers to the summit of Devil's Mountain, in order to bomb the trains on the Union supply line. His friend, Union Major Will Denning, is charged with stopping the rebels and plans to blow up the mountain, not knowing his West Point roommate is in charge of the rebels occupying Devil's Mountain.