North Korea's 8th Special Forces hijack a shipment of CTX, a potent new liquid explosive, and threatens South Korea as part of a plot to re-unify the two countries. Ryu and Lee, special agents of O.P., South Korea's secret intelligence service, attempt to track down the terrorists and find the CTX. Meanwhile Hee, the 8th's ultra-bad female sniper, resurfaces to wreak havoc and haunt Ryu.

Han Suk-kyu
as Yu Jong-won

Choi Min-sik
as Park Mu-young

Yunjin Kim
as Lee Myung-hyun

Song Kang-ho
as Lee Jang-gil

Yoon Joo-Sang
as Chief Agent

Park Yong-woo
as Eo Seong-sik

Park Eun-sook
as Lee Bang-hee

Jo Deok-hyeon
as Lee Won-doo

Park Dong-bin
as Bae Won-seok

Kim Soo-ro
as Ahn Hyun-chul