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

Won Ryu-hwan / Bang Dong-gu

Park Ki-woong

Lee Hae-rang

Lee Hyun-woo

Lee Hae-jin

Son Hyun-joo

Kim Tae-won

Ko Chang-seok

Seo Sang-gu