In the romantic-comedy "Secret Agent Miss Oh," lead actor Kim Sang-Kyung plays NIS (National Intelligence Service) agent Ko Jin-Hyeok. With Jin-Hyeok's background in the special forces he is perfectionist at work, but in his personal life he is mired with flaws. Lead actressLee Soo-Kyung plays the highly unpredictable female police officer Oh Ha-Na. Ha-Na has a bright and lovely image. Meanwhile, actor Ryu Jin plays Han Do-Hoon. Do-Hoon was born into wealth, but his father announced that he is donating his fortune away. Because of this Do-Hoon turn to life a crime to gain wealth ...