While combing through the belongings of his recently deceased aunt, Matsuko, nephew Sho pieces together the crucial events that sank Matsuko’s life into a despairing tragedy.

Youngsters called Kildren, who are destined to live eternally in their adolescence. The Kildren are conscious that every day could be the last, because they fight a war as entertainment, organized and operated by adults. But as they embrace the reality they are faced with, they live their day-to-day lives to the full.

2067: Isolation: Japan seals herself off from the eyes of the world in the face of unilateral international policy setting strict limits on the use of robotic technology. The island nation exists only behind a veil of seclusion. No soul shall enter. No soul shall leave. 2077: Revelation: The veil is breached. Japan is infiltrated by agents of the organization S.W.O.R.D., a fighting force operating outside of the protection of the United States and her allies. Their mission: Determine if the Japanese are developing banned robotic bio-technology, forbidden due to its threat to humankind. In the battle between machine and man, humanity stands to suffer most.

Two sets of parents divorce and marry each other, while their children Miki and Yuu are caught in the middle and start falling for each other.

In order to settle a business dispute, a mob leader murders one of his own teenage sons. The surviving son vows to avenge his brother’s death, and organizes his own gang of teenage killers to destroy his father’s organization.