William Lundigan is appointed to the Foreign Service. Because his parents were missionaries in Mongolia, he speaks the language and is quickly assigned to a listening post in Inner Mongolia. Soon after he arrives, however, renegades warlord Richard Loo siezes the town and the consulate in his plan to establish his independent principality.
It's a very old-fashioned movie directed by Sam Newfield, now gone from the remnants of PRC, but still chugging along with his brother Sigmund Neufeld as producer. This one is even a color production, although it's shot in Cinecolor and the print I looked at was dark and the color values a bit faded.
There's no direct mention of current events in China; the Civil War was proceeding apace and eight months after this movie was released, the National government would be expelled from the mainland. In the meantime, several talented but out-of-favor performers try to make the lines sound good, actors like virginia Bruce, Jonathan Hale and Philip Ahn; and the easily recognized Iverson ranch pretends to be Inner Mongolia.