Secretly, Greatly

Three elite North Korean sleeper agents live under cover for so long that they believe their cover stories are their real identities. They are shocked when they are ordered to kill one another or face death at the hands of an elite hit team.

Cast: Kim Soo-hyun, Park Ki-woong, Lee Hyun-woo, Son Hyun-joo, Park Hye-sook, Ko Chang-seok