Jeong-eun is embarrassed that her mother, who is suffering from dementia, wants to meet and call her sister from who was separated with due to the Korean War. However, Jeongeun accidentally receives a wrong call from a North Korean woman and is asked a favor.

In North Korea, torrential rains force the dams open, sending floodwater into the south. Later, two kids in South Korea pick up a plastic bag carrying a beetle in the stream. When they learn that the beetle is a North Korean child’s school project, they raise the beetle for him.

On 31 January 1968, 31 North Korean commandos infiltrated South Korea in a failed mission to assassinate President Park Chung-hee. In revenge, the South Korean military assembled a team of 31 criminals on the island of Silmido to kill Kim Il-sung for a suicide mission to redeem their honor, but was cancelled, leaving them frustrated. It is loosely based on a military uprising in the 1970s.

Based on the long running play by Jang Jin, the story is set in Korea during the Korean War in 1950. Soldiers from both the North and South, as well as an American pilot, find themselves in a secluded and naively idealistic village, its residents unaware of the outside world, including the war.

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.

When a crime organization from North Korea crosses borders and enters South Korean soil, a South Korean detective must cooperate with a North Korean detective to investigate their whereabouts.

Two friends accidentally drift from North Korea into South Korea after falling asleep during a fishing trip. Broke and unable to get home, they enter a singing contest whose grand prize is a trip to North Korea!

Ji-eun, a member of North Korea's dance troupe and the daughter of the North Korean leader, escapes to the South after one of their perfomances. Eager to explore the liberal life in Seoul, Ji-eun searches for a new life of freedom in South Korea. She soon comes across Joon-ho, a leader of a local rock band. Their relationship then takes unexpected turns as they become closer to each other. Meanwhile, the intelligence agency in South Korea learns of a conspiracy being orchestrated by the American CIA to disrupt the peace on the Korean peninsula; the CIA plots to secretly kidnap Ji-eun. Secret forces from the North and South reluctantly agree to work together to prevent a possible war between their two countries.

A comical encounter between South and North Korean soldiers over the 5.7 billions won lottery that crossed the military demarcation line on the wind.

When two brothers are forced to fight in the Korean War, the elder decides to take the riskiest missions if it will help shield the younger from battle.

Two North Korean soldiers are killed in the border area between North and South Korea, prompting an investigation by a neutral body. The sergeant is the shooter, but the lead investigator, a Swiss-Korean woman, receives differing accounts from the two sides.

In 2029, an elite police squad combats an anti-reunification terrorist group while another enemy lurks nearby.