In the rebellious northern frontier province of colonial India, British Army Captain Scott, a young prince and the boy’s governess escape by an obsolete train as they are relentlessly pursued by Muslim rebels intent on assassinating the prince.

In the Northwest Frontier of India, the 41st Bengal Lancers leaded by the harsh Colonel Tom Stone are having trouble with the rebellious leader Mohammed Khan. After two casualties, the experienced but insubordinate Lieutenant Alan McGregor receives as replacement, the arrogant Lieutenant Forsythe and the immature son of Colonel Stone, Lieutenant Donald Stone. With the intention to prove that he will not have any privilege in the troop, the reception of Colonel Stone to his son is absolutely cold, but he becomes the protégé of McGregor. When Lieutenant Stone is kidnapped by Mohammed Khan, McGregor and Forsythe disobey the direct order of their commander, disguise as Indian peddlers and go to Khan’s fortress to attempt to rescue their friend.

Freshly arrived Sandhurst-trained Captain Alan King, better versed in Pashtun then any of the veterans and born locally as army brat, survives an attack on his escort to his Northwest Frontier province garrison near the Khyber pass because of Ahmed, a native Afridi deserter from the Muslim fanatic rebel Karram Khan’s forces. As soon as his fellow officers learn his mother was a native Muslim which got his parents disowned even by their own families, he falls prey to stubborn prejudiced discrimination, Lieutenant Geoffrey Heath even moves out of their quarters, except from half-Irish Lt. Ben Baird.