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. Brigadier general J. R. Maitland, whose policy is full equality among whites, learns King knew Kurrum Khan as a boy and charges him with training and commanding native cavalry, which comes along fine. The general's egalitarian daughter Susan Maitland takes a fancy to King, even falls in love but the general decides to send her safely home to England after a kidnapped attempt when King saved her. King volunteers to take out Khurram Khan, the only man who can bring the normally dived local tribes together in revolt, pretending to have deserted...