After a high-ranking North Korean official requests asylum, KCIA Foreign Unit chief Park Pyong-ho and Domestic Unit chief Kim Jung-do are tasked with uncovering a North Korean spy, known as Donglim, who is deeply embedded within their agency. When the spy begins leaking top secret intel that could jeopardize national security, the two units are each assigned to investigate each other.
Lee Jung-jae
Jung Woo-sung
Jeon Hye-jin
Heo Sung-tae
Go Youn-jung
Kim Jong-soo
Jeong Man-sik
Lim Hyung-kook
Jung Kyung-soon
Jeong Jae-seong
Song Young-chang
Hwang Jung-min
Lee Sung-min
Yoo Jae-myung
Kang Kyung-hun
Im Sung-jae
Jeong Seong-mo
Paul Battle
Kim Hak-seon
Oh Man-seok
Andreas Fronk
Lee Chae-eun
Song Duk-ho
Jang Seo-kyung
Kim Chan-hyung
Kim Hyeong-beom
Kyung Sung-hwan
Yoon Jeong-sub
Choi Woo-jun
Park Sung-woong
Jo Woo-jin
Kim Nam-gil
Ju Ji-hoon
Cha Rae-hyung
Lee Han-ju
Go Seo-hee
Son Kyoung-won
Lee San-ho
Cha Woo-jin
Park Min-jeong
Son Seung-beom
Moon Yoo-seong
Jonathan Ehren Groff
Joe Nowell
Josh Newton
Moon Jung-dae
Lee Ga-kyung
Choe Min
Park Young-jun
Kim Dong-hyung