Based on real events, A Hill in Korea charts the fortunes of a small group of British soldiers serving in the Korean War. Out on a routine patrol, the soldiers find that Chinese troop movements have cut them off from their own lines. They try to fight their way back to safety but with the enemy surrounding them on all sides, the prospects look bleak. Facing almost insurmountable odds, they decide to stand a fight.
Years after his squad was ambushed during the Gulf War, Major Ben Marco finds himself having terrible nightmares. He begins to doubt that his fellow squad-mate Sergeant Raymond Shaw, now a vice-presidential candidate, is the hero he remembers him being. As Marco's doubts deepen, Shaw's political power grows, and, when Marco finds a mysterious implant embedded in his back, the memory of what really happened begins to return.