 In a mission in China in 1935, Agatha Andrews (Margaret Leighton) is a rigid missionary beset by Mongolian bandits led by Warlord chief Tunga Khan (Mike Mazurki). With her are her assistant Jane Argent (Mildred Dunnock), staff members Emma Clark (Sue Lyon), Miss Russell (Anna Lee) and Miss Binns (Flora Robson), head of the British mission, Charles Pather (Eddie Albert) a teacher at the mission and his pregnant wife Florrie (Betty Field). When Dr. D.R. Cartwright (Anne Bancroft) arrives, she agrees to sacrifice herself to the Tunga Khan in exchange for his letting the ladies go free. John Ford s final film.