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.

Country: South Korea

Cast

Kim Soo-hyun

Park Ki-woong

Lee Hyun-woo

Son Hyun-joo

Ko Chang-seok

Kim Sung-kyun

Shin Jung-keun

Hong Kyung-in