Elite international black ops ghost agent, Kim Seol-woo (Park Hae-jin), is recruited by a Hallyu star, Yeo Woon-gwang (Park Sung-woong) to work as his bodyguard. While undercover, he secretly untangles a mystery around the death of a former agent and develops an interest in Woo-gwang’s manager, Cha Do-ha (Kim Min-jung).
