Commitment (Korean: Hanja: RR: Dongchangsaeng; lit. “Alumnus” or “The Graduate”) is a 2013 South Korean action drama film starring Choi Seung-hyun. He plays the teenage son of an ex-North Korean agent who is tasked to kill a North Korean assassin in South Korea in order to save his younger sister played by Kim Yoo-jung.
The film is about third generation Koreans since the division of the peninsula and the Korean War, historical events that the teenage characters did not directly experience, but nevertheless, change their lives and destinies.
Nineteen-year-old Li Myung-hoon (Choi Seung-hyun) never imagined he would become a killer. Born to a privileged life in North Korea, his dream was to become a pianist. But when his father, a North Korean spy, dies disgraced, Myung-hoon and his younger sister Hye-in (Kim Yoo-jung) are sent to a “guilt-by-association” forced labor camp. Their father’s superior, high-ranking military official Colonel Moon (Jo Sung-ha) proposes a deal to Myung-hoon: if he goes down to the South as a “technician” (an assassin) and finishes what his father had failed to accomplish, he and his sister will be released from the prison camp. Myung-hoon accepts the deal and undergoes two years of intense training.
Myung-hoon finally arrives in South Korea under the guise of a North Korean defector. He is adopted by a South Korean couple who are actually North Korean spies and enrolls at a local high school. He gradually befriends Hye-in (Han Ye-ri), a bullied schoolgirl who shares the same name as his sister and has aspirations of becoming a professional dancer. Myung-hoon then receives his mission: in order to rescue his sister and go back home to the North, he must locate and take out “Big Dipper” (Jung Ho-bin), a North Korean agent working for the opposing government faction. Meanwhile, a power struggle ensues in North Korea with the failing health of dictator Kim Jong-il, and Myung-hoon quickly becomes a liability and must ultimately cope with Colonel Moon’s treachery.