Jo Gyu-won

Hyunjun and Sawoo, close friends and rivals from the South Korean special forces, are recruited by the secret agency NSS. They both fall for Seunghee, the beautiful but lethal profiling specialist at NSS. When they are faced against each other in a nuclear terrorist attack, they are forced to make their final decision and Seunghee's formidable secret is revealed.

IRIS II: New Generation explores the aftermath events of IRIS as well as Athena: Goddess of War. The story explores the origins of the former Director of the NSS and IRIS agent, Baek San, and the protagonist Jung Yoo-gun.

During the Japanese colonial rule of Korea, a Korean surgeon who was raised by a Japanese family becomes a spy for the Korean government.