IRIS The Movie (2010)

Cast
Lee Byeong-Heon (이병헌) as NSS agent, Kim Hyeon-joon (NSS요원, 김현준)
Kim Tae-hee (김태희) as NSS profiler, Choi Seung-hee (NSS 프로파일러, 최승희)
Jeong Joon-ho (정준호) as NSS worker, Jin Sa-woo (NSS요원 진사우)
Kim Seung-woo (김승우) as North Korean secret agent, Park Cheol-yeong (븍측 첩보요원, 박철영)
Kim So-yeon (김소연) as North Korean spy operator, Kim Seon-hwa (북측 공작원, 김선화)
Choi Seung-hyeon (최승현) as Killer in the group Iris, Vick (아이리스 소속 킬러, 빅)

Also known as "IRIS - The Last (JP title)"

Trailer

Synopsis
Korea, the last divided nation on earth, is constantly under political and military tension with the surrounding countries especially with the North Korean nuclear issue. To avoid the second Korean War, the secret service agency NSS exists for the national security on the Korean peninsula.
NSS special agents are trained specialists who would use any means to fulfill their mission. They officially do not exist and are not acknowledged or protected by the government. Although they are trained to be cold-blooded killers, there is one taboo they cannot avoid; that is love.
Hyeon-jun (Lee Byung-Hun) and Sa-woo (Jeong Jun-Ho) are close friends and rivals in the 707 special forces. They are both recruited into NSS and quickly become the best of the best. Each with different secret assignments, they soon have to take on different paths of life, and even against each other. In a world of conspiracy and betrayal, they both fall for Seung-hee (Kim Tae-Hee), the beautiful but lethal profiling specialist at NSS. They are forced to make their final decision when they are faced against each other in a nuclear terrorist attack, and Seunghee’s formidable secret is revealed.