Deep in the Korean mountains, U.S. sniper Caje Cole and his squad are on patrol when they witness a dogfight that ends with an American pilot being shot down over enemy territory. Cole leads the rescue effort that puts him in conflict with a deadly Chinese sniper, but that turns out to be the least of his worries. Enemy forces are on the move, starting with the capture of an outpost just beyond the American line. To stop a large Chinese force poised to smash American defenses, Cole joins a makeshift unit sent to hold an ancient fort at a mountain pass. Joining his squad will be Korean volunteers and a platoon of disgraced troops seeking a second chance to prove themselves. These misfits will fight a desperate last stand against overwhelming odds as Cole faces a showdown of his own with the enemy sniper and a ruthless political officer.