If there’s an easier way to land a permanent job, she doesn’t know what it is. Jang Young Shil (Kang Ye Won) has gotten every type of certification possible but is still having trouble getting a full-time job in her mid-30s. When she finally lands a temp job at the National Security Agency, she is ecstatic and wants to do everything possible to try to turn the opportunity into a permanent position. When NSA Director Park (Jo Jae Yoon) is scammed out of a large sum of money by a voice phishing scam, Young Shil works out a deal with her boss to get his money back in exchange for a full-time job. With the help of the foul-mouthed police detective Na Jung An (Han Chae Ah), Young Shil goes after the evil Min Seok (Namgoong Min), whose company is responsible for the voice phishing scheme. Can the accidental spies infiltrate the voice phishing network and get what they want most out of life?