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

The President of South Korea races against time to prove the seal on documents from long dead King Gojong is fake by charging outspoken historian Choi Min-jae, and a descendant of the royal bloodline Kim Yu-shik, to find the long lost seal in order to prove that the Japanese claim to railroads is false, a claim that will stop the reunification of the two Koreas.

In 1990, number of children suddenly disappear. Meanwhile, the Ministry of Defense selects an elite group of scientists for a top-secret mission. Then, 30 years later ... The year is 2020 on a reunified Korean Peninsula. A string of murders is committed against retired scientists. The Special Investigations (SI) unit staffed by a crack team from the former North and South Koreas and outfitted with the latest technology is brought in to investigate. The killer, however, far from being deterred, taunts them with a signature pendant at every murder scene. In an act of devilish boldness he even kidnaps the son of the investigation team's leader, Seok

In 2025, South and North Korea unified. It was triggered by a sudden explosion in Midnight near the North of DMZ by a forest fire in December, 2024. The South Korean army unwittingly ended up helping to put out the fire. Such cooperation caused their unification. And 10 years later, A koreanAmerican Documentary Director Steven, working for USA tv-station NXN visits to korea. He is searching for information about the mysterical Green-light appeared in that forest fire in 2024. After some dangerous twists and turns, He found a huge secret of the DMZ fire and green light.

After sudden unification, the Korean peninsula is struggling with economic chaos. An old laborer, Chan-ki, receives a new high-tech telephone from his son in China and goes to seek help from his neighbor, as he does not know how to use it.