A small unit of U.S. soldiers, alone at the remote Combat Outpost Keating, located deep in the valley of three mountains in Afghanistan, battles to defend against an overwhelming force of Taliban fighters in a coordinated attack. The Battle of Kamdesh, as it was known, was the bloodiest American engagement of the Afghan War in 2009 and Bravo Troop 3-61 CAV became one of the most decorated units of the 19-year conflict.

根据2007年塔利班挟持韩国人质事件改编，故事讲述在2007年7月在阿富汗一群23名韩国籍基督教传教士及志工被塔利班成员挟持为人质，黄政民饰演的外交部规划与协调人员不惜以生命代价解救人质。