While, Yoon-Joo takes her test, James (Jung Woo-Sung) and his crime group robs a bank. He stands on the rooftop of a nearby building and directs his team's movements. He doesn't tolerate any mistakes.
As soon as Yoon-Joo joins the surveillance team, they are tasked to take down James' criminal group. The surveillance team immediately runs into trouble when they can't identify any of the robbers due to their masks and their efficiency in robbing the bank. Detective Hwang finds one man caught on CCTV near the bank.
James gets a new order from a mysterious broker (Kim Byung-Ok) and once again completes a heist. While, the surveillance team goes after James, the mysterious broker also looks to take out James.
Sol Kyung-gu as Chief detective Hwang
Jung Woo-sung as James, leader of an international crime ring
Han Hyo-joo as Rookie detective Ha Yoon-joo
Jin Kyung as Department head Lee
Lee Junho as Detective Daramjwi ("Squirrel")
Kim Byung-ok as mysterious broker/cobbler
Simon Yam as target of surveillance team (cameo)