Set during the wave of democratization and cultural modernization that swept across South Korea in the early 1990s, The Koreans will follow a middle-class family hiding a treasonous secret. While seemingly ordinary citizens in the eyes of their friends, neighbors and even their children, both parents actually are elite North Korean spies working to bring down the South from within. Highlighting the stark difference between these two formerly united countries, the series will follow the spies as they wrestle with conflicting feelings of patriotism, loyalty, identity and love, while a ruthless Korean counterintelligence agent draws ever closer to discovering their identities.