"Secretly Greatly" is a South Korean film released in 2013, directed by Jang Cheol-soo. The story follows three North Korean spies who are sent to South Korea to gather intelligence. They assume different identities, blending into society while hiding their true mission. The film stars Kim Soo-hyun, Park Ki-woong, and Lee Hyun-woo. It combines elements of action, comedy, and drama, exploring themes of loyalty, identity, and the complexities of life in a divided Korea. The film was well-received for its engaging plot and strong performances, particularly by its lead actors.