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.

In a small North Korean village near the border of China, there are believers who get together in an underground church, away from the eyes of the persecuting government. When the missionary from China, their only support route, is cut off, things begin to get very tense. Chulho, who had been arrested along with his wife, returns. After losing his wife in the interrogations, Chulho had been released and unseen for 2 years before coming back to his home, claiming that he had been commanded by God to lead the believers across the border and into South Korea. The brothers wonder if Chulho is trustworthy, and whether it is the right thing to do to leave their homeland.

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.

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.

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.

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.

Ji-woo, an outcast at a prestigious private school, meets Hak-sung, the school janitor who is actually a mathematical genius who defected from North Korea.

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 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.

Caught in forbidden love, Yong Joon defects from North Korea, leaving Jae Sung behind. Years later, a reunion forces him to choose between past and present.

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.

When South Korean heiress, Yoon Seri, unexpectedly crash-lands in North Korea after a paragliding mishap, her life takes an unforeseen turn.