Set 3 years after the first season, members of the National Security Service (NSS) team, including Jung Yoo Gun, Ji Soo Yeon and other agents attempt to pull the curtain on mysterious group IRIS. Agent Yoo Gun is the leader of the NSS TF-A team. While he goes up against Baek San, Yoo Gun becomes involved in a case which changes his fate forever.
Pyo Min-soo
Director
Kim Tae-hun
Director
Jang Hyuk
Jung Yoo-gun
Lee Beom-soo
Yoo Joong-won
Im Soo-hyang
Kim Yeon-hwa
Lee Da-hae
Ji Soo-yeon
Kim Yeong-cheol
Baek San
Oh Soo-yeon
Oh Yeon-soo
Choi Min
Kim So-yeon
Cha Soon-hyeong
IRIS Agent, Clerk
