Alone in post-World War II China, American spy Tompkins must be cautious at all times. For reasons even he himself does not understand, Tommy opts to buy a young Korean woman. Yunhee Kim quietly enters Tommy's life, living with him in Hangkow, China. But when Tommy's cover is blown, Yunhee reveals herself to be a Korean intelligence agent. Together, the two flee Hangkow and accept an even more dangerous assignment that will take them into Communist North Korea.