In Korea, where job crunch is becoming a major issue, there's a desperate woman, more than ready for a full time job, 35 year-old Yeong-sil. She obtained all kinds of certification, including military training, and she finally gets a call from National Security Agency to be an intern, but it's only temporary. One day, she accidentally discovers that her boss was scammed of half million dollars by phishing. Using this chance, shemakes a deal with her boss: if she brings back the money, she'll be hired full time. Now as an undercover spy, Yeong-sil starts to work at the voice phishing center. Would she find the criminal and become a real employee?