North Korea's 8th Special Forces hijack a shipment of CTX, a potent new liquid explosive, and threatens South Korea as part of a plot to re-unify the two countries. Ryu and Lee, special agents of O.P., South Korea's secret intelligence service, attempt to track down the terrorists and find the CTX. Meanwhile Hee, the 8th's ultra-bad female sniper, resurfaces to wreak havoc and haunt Ryu.

It follows a group of close friends in their seventies, still chasing their dreams and love lives to the fullest. Lee Sun Jae used to be a big star but now lives a simple life. Despite challenges, he handles neighborhood problems with humour and wisdom. Kim Yong Gun, another former star turned director, adds fun with his playful arguments. Lim Chae Mu, dreaming of YouTube fame after a career in lighting, completes the trio. Together, they show that friendship and adventure never get old and that age is just a number.

A low-life scumbag gets kidnapped by a mysterious gang and put through inhumane training to become a mole inside the police force.

A model student transfers to the notorious Jungmoon High School known for its severe corporal punishment by teachers and power struggles between school gangs.

A small-time thug who collects debts for the local triad is torn between his criminal aspirations and his devotion to family.

A quartet of disaffected Korean youths have robbed a Seoul gas station. After taking the gas station over, their wacky antics ensue; forcing the manager to sing, kidnapping customers that complain about the service, and staging fist-fights between street gang members and gas station employees; all of these reflect their own gripes against society.

Four men with complicated love lives refuse to admit they're getting older, and attempt to prove that forty is the new thirty!