Yoo Gun (Jang Hyuk) will plays the team leader of the NSS and Ji Soo Yeon (Lee Da Hae) plays an Olympic gold medalist shooter who turned into spy sniper. Meanwhile, Yoo Joong Won (Lee Bum Soo) plays a formal spy for North Korea and Choi Min (Oh Yun Soo) will plays the newly appointed deputy director of the NSS. At the same time, Seo Hyun Woo (Yoon Doo Joon) will plays a perfect agent and Yoon Si Hyuk (Lee Joon) will plays the computer genius in NSS’ Command Center. Kim Yeon Hwa (Im Soo Hyang) will play a killer in IRIS 2.