A period spy drama set in the Cold War 1980s, it portrayed a couple who moved to the United States to assimilate, live and work as Americans, but were secretly officers in the KGB.

Meet Ka Zeng and Fei Zhang. She (Ka) is a professor of political science at the University of Arkansas in Fayetteville, Arkansas. He (Fei) is a Senior Director at the corporate headquarters of J.B. Hunt Transport Services, Inc., one of the largest trucking and logistics companies in the United States. They have lived in Northwest Arkansas for over 20 years.

However, their careers began in an unusual way for a seemingly assimilated immigrant couple in the American South. They attended college together at China Foreign Affairs University (CFAU). Now, CFAU is not just any university in China. Jointly run by the Ministry of Foreign Affairs and the Ministry of Education, the university refers to itself as "the cradle of Chinese diplomats."