은밀하게 위대하게 Secretly, Greatly 2013

Secretly, Greatly (Hangul: 은밀하게 위대하게; RR: Eunmilhage Widaehage) is a 2013 South Korean action comedy-drama film starring Kim Soo-hyun, Park Ki-woong, and Lee Hyun-woo, who play North Korean spies who infiltrate South Korea as a village idiot, a rock musician, and a high school student, respectively. They assimilate to small town life while awaiting their orders, until one day, due to a sudden power shift in the North, their mission turns out to be an order to commit suicide. The film is based on the 2010 spy webtoon series Covertness by Hun, which has received over 40 million page hits.

Upon its release on June 5, 2013, the film broke several box office records in South Korea: the highest single day opening for a domestic film, most tickets sold in one day for a domestic film, the biggest opening weekend, the highest-grossing webtoon-based film, and the fastest movie to reach the 1 million, 2 million, 3 million, and 4 million marks in audience number. Movie pundits attribute its success to a large percentage of teen audience turnout.

A group of spies called the 5446 Corps were trained by North Korean elite special forces since their youth, ostensibly towards the lofty goal of unifying Korea. They are ambitiously dispatched to South Korea, where each disguises himself as a fool, an aspiring singer, and a high school student. Passing boring time without receiving any orders from the North, they gradually get used to life as ordinary neighbors in a small town until one day, their mundane lives are turned upside down when a "secret and great" mission is suddenly assigned to them. Due to the events of theSecond Battle of Yeonpyeong, South Korea demands the names, location, and rank of 30 North Korean spies active in South Korea, promising financial aid to the North on the condition that Pyongyang turns in their spies. To prevent the elites from falling into enemy hands, the North Korean government orders dozens of active duty spies to take their own lives. Meanwhile their North Korean army instructor Kim Tae-won crosses the border to eliminate those who refuse to follow.

• Kim Soo-hyun - Lieutenant Won Ryu-hwan / Bang Dong-gu

North Korean top agent who beat out 20,000 other competitors, is fluent in five languages and has an uncanny ability to read people. Disguised as a village idiot.

• Park Ki-woong - Rhee Hae-rang / Kim Min-su

Son of a high ranking North Korean official Rhee Moo-Hyuk, and as an agent is almost as good as Ryu-hwan. Disguised as a singer-wannabe.

• Lee Hyun-woo - Rhee Hae-jin

The youngest secret agent in North Korean history. Disguised as a high school student.

• Son Hyun-joo - Colonel Kim Tae-won, 5446 Corps training chief

• Park Hye-sook - Jeon Soon-im, "Market granny"
• Kim Sung-kyun - Seo Soo-hyuk, NIS team leader
• Go Chang-seok - 2nd Lieutenant Seo Sang-gu / Professor Seo Young-guk
• Jang Gwang - Go Hwi-sun, "Old man Go"
• Shin Jung-geun - Mr. Park, the barber
• Hong Kyung-in - Jo Doo-seok, Soon-im's son
• Lee Chae-young - Heo Jeom-ran, nicknamed "Ran"
• Park Eun-bin - Yoon Yoo-ran
• Choi Woo-shik - Yoon Yoo-joo, Yoo-ran's younger brother
• Joo Hyun - Rhee Moo-hyuk, 5446 Corps founder and Hae-rang's father

http://cartoon.media.daum.net/webtoon/view/covertness

http://www.hancinema.net/korean_movie_Secretly_and_Greatly.php