During the British Raj, Sergeant Donald MacDuff escorts Joyce Williams, an impoverished widow, and her young daughter, Priscilla, to a remote military outpost on the northern frontier of India, to live with her stern father-in-law, Colonel Williams. Along the way, they witness the capture of notorious rebel chief Khoda Khan. Soon, Priscilla, nicknamed 'Wee Willie Winkie' by MacDuff, wins the hearts of all the soldiers, especially her grandfather and MacDuff; even Khoda Khan is touched by her visits to cheer him up in his captivity. Meanwhile, her mother is courted by Lieutenant Brandes.