Synopsis of the main story:

A thousand years ago in the Digital World, the Virus Species, led by the Dark Digimon, launched a war of aggression against the entire Digital World in order to dominate the Digital World. And the three angels have to resist the enemy in order to protect the digital world.

The Seven Demon Kings representing different camps also suddenly appeared. Due to the strength of the Seven Demon Kings, the Angel-type Digimon began to retreat.

As the war was too fierce and the balance of the digital world was affected, Igudo Lahir sent the royal knights to help the three angels.

Because the war was too tragic, the Seven Demon Kings were finally defeated and sealed at the expense of several royal knights, and only the Divine Celestial Maiden Beast survived among the three major angels.

A thousand years later, Digimon began to proliferate, and the world managed by the terminal computer world tree was in danger of collapsing due to the ever-expanding amount of data.

And in the human world, ten years ago, anomalies began to appear all over the world, inexplicably humans disappeared, and some people even saw monsters with their own eyes. At the same time, Ryder's parents can confirm through investigation that the dimension of the human world is distorted, and that there is another unknown world that is related to the human world. After many days of research, Ryder's parents invented the dimensional door to the other world, but in an experiment, 7-year-old Ryder was watching his parents' experiment, the dimensional gate suddenly malfunctioned, and Ryder was sucked into the other world. In order to find his children, he established the Digital World Expedition, which also includes Kaye and Yabei's father

After the members of the expedition returned, Ryder's parents, with the consent of the government, established DHT, a secret organization for hunting Digimon, with their friends, to hunt Digimon that had strayed into the human world and return Digimon to the Digital World

However, as the number of Digimon increases, the protagonists begin to perceive that someone is deliberately sending Digimon to the human world to attack them

It wasn't until the appearance of the Demon Kitemon that it was revealed that the Digimon were facing destruction, and the Digimon who attacked Kaye and the others were also subordinates of the Vampire Beasts, and learned that the Vampire Beasts seemed to be planning to invade the human world.

After a series of sad events, Kaye and the others plan to go to the digital world to complete their mission and learn the truth about the incident.

The truth is not as simple as they think, so what they are experiencing