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.

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 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.

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.

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.

Sung-geun is an untalented actor who makes a living playing minor roles. He happens to land on the role as Kim Il-sung, the former leader of North Korea, for the rehearsal of the South-North Korea Summit. Sung-geun becomes passionately immersed in his role, motivated by his son who looks up to him. However, the summit is not realized, and Sung-geun ends up lost in the delusion that he really is Kim Il-sung.

Yong-soo is an ex-soccer player who lives in a small coal-mine village in North Korea with his wife and young son, Joon. Although living in extreme poverty like many other families in North Korea, the family is happy just to be with each other. Then one day, Yong-soo's pregnant wife becomes critically ill. Let alone medicine, Yong-soo can't even find food for her in North Korea. So he decides to secretly cross the border to China hoping to find the medicine for his wife.

Two spies share a secret bond, despite their loyalties. A North Korean assassin is sent to Seoul to kill a dissident, but instead he teams up with a South Korean agent in search for revenge.

After defecting from North Korea, Loh Kiwan struggles to obtain refugee status in Belgium, where he encounters a dejected woman who has lost all hope.

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

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